Fixed issues

May 10, 2017

XenApp/XenDesktop 7.6 LTSR Cumulative Update 2 contains all fixes that were included in XenApp and XenDesktop 7.6 LTSR and Cumulative Update 1, plus the following, new fixes: 

Citrix Director

  • When a user session is viewed in the HDX panel of Citrix Director, a priority warning might incorrectly appear for the audio virtual channel.

    [#LC5564]

Citrix Policy

  • The w3wp.exe process can consume 100% of the CPU.

    [#LC4355]

  • Citrix Studio might allow policy filter editing for read-only administrators.

    [#LC4801]

  • Citrix group policies stored in Active Directory are removed from the machine on the next GPO refresh or when you run GPUpdate /Force. This issue occurs on VDA versions 7.6.300 and later.

    [#LC5204]

  • The following error message appears when opening the Citrix Studio and selecting the policy node:

    “Changes made to policies outside of this console, such as in PowerShell or management tools from previous versions, resulted in a discrepancy between policies. The assigned objects of policy <policy name> must match. Object Delivery Group has assignments <assignment name> in the “user” component and <assignment name> in the “computer” component.”

    [#LC5510]

Citrix Studio

  • Citrix Studio does not receive logging entries while in the logging node when trying to retrieve large amounts of data.

    [#LC5292]

  • Citrix Studio might show an incorrect message or prompt for a Site upgrade when a FlexCast Management Architecture service has been stopped or is unavailable.

    [#LC5319]

Controller

  • When a large number of sessions are launched in a short time, Director might take a long time to show session information.

    [#LC1617]

  • When using VMware ESXi 5.x or 6.0 to create MCS machines, occasionally the machine deployments are consolidated and cloned as a thick provisioned disk.

    [#LC4655]

  • When the VDA is in maintenance mode, the Get-BrokerSession cmdlet might return the maintenance mode state of the Delivery Group instead of the individual machine.

    [#LC4840]

  • Citrix Studio occasionally launches with the following error message: “Could not connect to broker service.”

    [#LC4854]

  • This fix addresses an issue that prevents Machine Creation Services provisioning from working in Amazon Web Services when the Controller is isolated from Amazon’s public API endpoints by way of a web proxy.

    [#LC5109]

  • Citrix Studio might show an incorrect message or prompt for a Site upgrade when a FlexCast Management Architecture service has been stopped or is unavailable.

    [#LC5319]

HDX MediaStream Flash Redirection

  • With HDX MediaStream Flash Redirection enabled, Microsoft Internet Explorer might close unexpectedly when it runs pseudoserverinproc2.dll.

    To enable the fix, create the following registry key:

    • On Windows 32-bit systems:
      HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\HdxMediaStreamForFlash\Server\PseudoServer Name: AllowCOMObjectTrack Type: DWORD Value: 0  

    • On Windows 64-bit systems:
      HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Citrix\HdxMediaStreamForFlash\Server\PseudoServer Name: AllowCOMObjectTrack Type: DWORD Value: 0  

    [#LC1885]

  • With HDX MediaStream Windows Media Redirection enabled, certain third party players might exit unexpectedly while rendering files on a VDA that is running on Windows 10.

    [#LC5110]

Licensing

  • Site Setup in Citrix Studio might fail to proceed when choosing “Use an existing license.” As a workaround, restart the Citrix Web Services for Licensing service on the license server to complete its configuration.

    [#630814]

Provisioning Services

   
Console Target Device
Server  

Console

  • When expanding Sites, the PVS console occasionally times out.

    [#LC4737]

  • The XenDesktop Setup wizard does not use the template boot properties when creating targets. To enable the fix, create the following registry key:

    HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\ProvisioningServices Name: UseTemplateBootOrder Type: REG_DWORD Data: 1

    [#LC5237]

Server

  • The number of target devices on the Provisioning Services Console might show less than the actual value after the database connection is lost and recovered.

    [#LC4275]

  • Boot Device Manager target devices fail to acquire an IP address whereas PXE target devices acquire them successfully. This happens because the DHCP Discover request sent by the Boot Device Manager set the “Seconds Elapsed” value to 0. The request is then dropped by IP Helper. The “Seconds Elapsed” value is now set to 4 to avoid this problem.

    [#LC4369]

  • If you change the MTU size to less than 1,500 byte, the bootstrap file fails to download and target devices fail to start using the Boot Device Manager (BDM). This enhancement allows you to lower the MTU size to less than 1,500 byte by setting the following registry key. The enhancement is disabled by default:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\PVSTSB\Parameters Name: AllowMTUAdjust Type: DWORD Value: 1

    [#LC4531]

  • When expanding Sites, the PVS console occasionally times out.

    [#LC4737]

  • When attempting to import a new vDisk version of a VHDX file, the import fails and an error message appears that says the Manifest file is invalid.

    [#LC4985]

  • The Provisioning Server logs might show incorrect IP addresses for target devices.

    [#LC5323]

  • The following database access error might appear in the event viewer of the Provisioning Server:

    “DBAccess error: <Couldn’t add record – same fields as an existing record><-31749>.”

    The issue occurs when multiple Provisioning Servers call a specific stored procedure simultaneously, causing conflicts between the calls to the stored procedure. As a result, an attempt to insert a record with the same key value twice might occur.

    [#LC5364]

  • Attempts to restart provisioned targets might fail intermittently because of a database timeout error. The following error message might appear:

    “Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.”

    [#LC5511]

  • The BNPXE Server that enables the target devices to start from the network binds to the IP address 127.0.0.1. This prevents target devices from booting. This issue can happen when BNPXE enumerates the network interfaces, but the operating system has not discovered all the interfaces yet and only returns 127.0.0.1.

    [#LC5916]

  • Attempts to start target devices might fail when using HP Moonshot systems.

    [#LC6024]

Target Device

  • When creating a personal vDisk, a “Personal vDisk cannot start” error dialog appears after the machine is booted and a formatted disk cannot be used due to an “unknown format” error.

    [#LC5935]

StoreFront

  • When using Windows Server 2008 R2, the Citrix StoreFront MMC might exit unexpectedly if you try to “Set Unified Experience as Default” in the Stores menu.

    [#LC3614]

  • This fix addresses issues with syncing changed subscription items from remote groups to local and back.

    [#LC4690]

  • Setting the “Session Timeout” of Citrix Receiver for Web to more than 24 days causes a Session Timeout warning to appear immediately after logon.

    [#LC4787]

  • The Desktop Appliance Site does not launch the assigned desktop if the store is using Resources Aggregation.

    [#LC4838]

  • With StoreFront 3.0.1, Workspace Control might not work when using Aggregation.

    [#LC5042]

  • When using PowerShell script commands, the AllFailedBypassDuration setting is occasionally not applied.

    [#LC5500]

  • If the “IncludedClientIPFilter” or “ExcludedClientIPFilter” options are enabled by the “Set-BrokerAccessPolicyRule” command, you might not be able to view resources such as shared resources, published desktops, or published applications on StoreFront.

    [#LC6058]

Universal Print Server

   
Client Server

Client

  • The NextGen application occasionally fails when trying to print to the Universal Print Server.

    [#LC4246]

Server

  • The Citrix XTE Server service (XTE.exe) can exit unexpectedly.

    [#LC0759]

VDA for Desktop OS

   
Desktop Studio Session/Connection
HDX 3D Pro Smart Cards
HDX MediaStream Windows Media Redirection System Exceptions
Installing, Uninstalling, Upgrading User Experience
Keyboard User Interface
Printing  
 
Printing
 
Printing

Desktop Studio

  • A logged off RDP session might appear as “Disconnected” in Citrix Studio and becomes unavailable for reconnection.

    [#LC5427]

HDX 3D Pro

  • The context menu might not display correctly on the desktop when the window is maximized.

    [#LC5263]

HDX MediaStream Windows Media Redirection

  • With HDX MediaStream Windows Media Redirection enabled, certain third party players might exit unexpectedly while rendering files on a VDA that is running on Windows 10.

    [#LC5110]

Installing, Uninstalling, Upgrading

  • Attempts to reconnect to a session from an endpoint with a different resolution can cause the VDA to exit unexpectedly and might result in a black or white window.

    [#LC4606]

Keyboard

  • When upgrading from Version 5.4.400 to Version 7.6.300, the ICA Service\System32 directory is missing, and keyboard/mouse inputs fail to register in Mac clients.

    [#LC4681]

Printing

  • When a default printer is not set, all mapped printers might fail in sessions.

    [#LC4354]

  • With legacy printer names enabled, autocreated printers might not be available for use in a published application when multiple sessions are established on a single server for the same user.

    [#LC4517]

  • The “Auto-create client printers” policy might fail to set default printers correctly in a published application and Microsoft XPS Document Writer is set as the default printer.

    [#LC4696]

  • Excel spreadsheets generated by SAP fail to print on printers redirected using the Universal Print Driver EMF driver.

    [#LC4853]

  • After a user logs off and logs back on, printers connected to the session might not be accessible.

    [#LC5188]

  • The Print Preview on Client option within Citrix Universal Print Driver displays to the local end point.

    [#LC5404]

Session/Connection

  • When resizing a reconnected session with a Citrix policy in place to prohibit session wallpaper and a Microsoft group policy in place that specified a wallpaper, the Citrix policy is not honored.

    [#LC0115]

  • Information remains visible on the screen after the VDA goes into screen saver or power save mode, until the user provides input (mouse or keyboard) which updates the session with a blank screen. This occurs when screen savers and the power-save option in sessions are enabled by the DWORD value HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\Graphics\SetDisplayRequiredMode = 0.

    [#LC1650]

  • On systems with Hotfix ICAWS760WX86022 installed, attempts to reconnect to a user session might fail when you restart the Citrix ICA Service.

    [#LC3714]

  • With this enhancement, an entry is written to the Windows Event log when a USB device is redirected in a session.

    [#LC3996]

  • When you log on to a web interface that is configured for single sign-on using UPN credentials, the session window might appear for a while and then exit unexpectedly.

    [#LC4035]

  • Using published instances of Microsoft Internet Explorer, attempts to download a file from a website and saving it to a mapped client drive (“Save as…”) can fail.

    [#LC4300]

  • Audio files might fail to play in a VDA session when connected through Citrix Receiver for Mac or a Chromebook.

    [#LC4596]

  • After a network interruption between a VDA and Citrix Receiver, you cannot play back an .avi file on Windows Media Player.

    [#LC4670]

  • When switching sessions between windowed and full-screen mode with legacy graphics mode enabled, the application windows running on the VDA might not retain the maximized state.

    [#LC4693]

  • After upgrading a VDA from version 5.6.300, VDAs can become unresponsive.

    [#LC4851]

  • Time zone redirection might not work in user sessions running on iOS devices.

    [#LC4869]

  • After using the Remote Desktop Protocol, the ICA session might display a grey screen when reconnecting to the VM. This issue only occurs on VDAs installed with /NOCITRIXWDDM.

    [#LC4970]

  • A USB device might fail to work after it is redirected to Version 7.6.300 of the VDA. The issue occurs when the instance ID of the device is different from the serial number.

    To enable this fix, add the Product ID or Vendor ID pairs to the following registry key:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\icausbb\Parameters Name: UsingSerialNumberDevices Type: REG_MULTI_SZ Value: <Note: Next to the comments string, add the vid=xxxx and pid=xxxx pairs. (The syntax for the value is an ordered list of case insensitive rules where “#” is a line comment and each rule is an ordered vid and pid pair. For example, vid=#-number and pid=#-number. The maximum hex value for a vid/pid is FFFF. If the length of a vid/pid hex value is less than 4, pair the number with zeroes (0). For example, if the vid is 12 and pid is 13; the vid/pid pairs should be vid=0012, pid=0013. Each rule has a fixed length: 17, no spaces at the beginning or the end of the rule. Examples: #vid=FFFF, #pid=FFFF #vid=0012, #pid=0013.)>

    [#LC5035]

  • The svchost.exe process can consume 100% of the CPU.

    [#LC5041]

  • With Excelhook enabled and after applying hotfix ICATS760WX64028, the Excel window does not minimize when clicking the Excel icon in the taskbar.

    [#LC5060]

  • The svchost.exe process might fail intermittently on SCardHook64.dll when a user is logging on or off and Certificate Propagation is active.

    [#LC5083]

  • This fix addresses an issue that breaks client-side fetching for DirectShow based applications, preventing videos from rendering.

    [#LC5098]

  • The operating system experiences an error on picadd.sys and a blue screen appears with bugcheck code 0xd5.

    [#LC5134]

  • An external USB DVD drive that is mapped into a session as a mapped client drive can cause slow session performance.

    [#LC5231]

  • COM port mapping can intermittently fail.

    [#LC5235]

  • The following counters in the performance monitor might display inconsistently.
    - \ICA Session\Input Session Bandwidth - \ICA Session\Output Session Bandwidth The issue occurs only when the count value is high.

    [#LC5262]

  • The operating system experiences an error on picadd.sys and a blue screen appears with bugcheck code 0x3b.

    [#LC5299]

  • The VDA might become unresponsive at the “Welcome” screen due to a deadlock on picadm.sys.

    [#LC5326]

  • Attempts to save a published Microsoft Excel spreadsheet to a Chromebook device might fail. The issue occurs because the file extension is not present.

    [#LC6001]

Smart Cards

  • The Sign-in option does not appear on Version 7.6.300 and later VDAs running on Windows 10 Build 10586 and later. As a result, smart card logons are not possible.

    [#LC4778]

  • When you allow your ICA session to be disconnected through an idle session timer and then log on to the Remote PC from the console, smart card logons no longer work. At times, the option to see the smart card tile is missing, or the card is not detected.

    [#LC5187]

  • XenDesktop smart card sessions might randomly disconnect.

    [#LC5265]

  • Attempts to log on by using certain smart cards might result in the following error message:

    “No valid certificates were found on this smart card. Please try another smart card or contact your administrator.”

    [#LC5456]

System Exceptions

  • With Adobe Shockwave plugin installed on a machine catalog that is attached to a PVD, Microsoft Internet Explorer might exit unexpectedly in a user session.

    [#LC4027]

  • The operating system experiences an error on picadm.sys and a blue screen appears with bugcheck code 0x50.

    [#LC4529]

  • The operating system experiences an error on picadm.sys and a blue screen appears.

    [#LC4567]

  • A non-handled exception copying from USB devices might cause the operating system to experience an error and a blue screen appears.

    [#LC4782]

  • A published application process might exit unexpectedly with an exception “c000041d” on MobileDesktopHook64.dll.

    [#LC4821]

  • When you log on to a VDA running on Windows Server 2008 R2 through a remote desktop and launch certain third-party applications, the applications might exit unexpectedly.

    [#LC5891]

User Experience

  • When you switch from a touch-optimized published desktop to a regular published desktop, the Start button:

    • Does not highlight when you hover over it
    • Brings up the local desktop instead of the published desktop

    [#LC3466]

  • Certain .wmv files might not play at the correct aspect ratio.

    [#LC4695]

  • Customized functions for a 3Dconnexion SpaceMouse might not work in a VDA session.

    [#LC4797]

  • Connecting to audio recording/dictation software during an ICA session might cause the software to exit unexpectedly.

    [#LC5407]

User Interface

  • After publishing seamless applications, the generic Citrix Receiver icon may appear instead of the published app icon in the taskbar.

    [#LC4757]

VDA for Server OS

   
HDX MediaStream Windows Media Redirection Smart Cards
Keyboard System Exceptions
Printing User Experience
Server/Site Administration User Interface
Session/Connection  

HDX MediaStream Windows Media Redirection

  • With HDX MediaStream Windows Media Redirection enabled, certain third party players might exit unexpectedly while rendering files on a VDA that is running on Windows 10.

    [#LC5110]

Keyboard

  • When upgrading from Version 5.4.400 to Version 7.6.300, the ICA Service\System32 directory is missing, and keyboard/mouse inputs fail to register in Mac clients.

    [#LC4681]

  • The Bloomberg keyboard is unable to be mapped within the VDA session even though it is allowed in the policy.

    [#LC5360]

Printing

  • When a default printer is not set, all mapped printers might fail in sessions.

    [#LC4354]

  • With legacy printer names enabled, autocreated printers might not be available for use in a published application when multiple sessions are established on a single server for the same user.

    [#LC4517]

  • The “Auto-create client printers” policy might fail to set default printers correctly in a published application and Microsoft XPS Document Writer is set as the default printer.

    [#LC4696]

  • Excel spreadsheets generated by SAP fail to print on printers redirected using the Universal Print Driver EMF driver.

    [#LC4853]

  • After a user logs off and logs back on, printers connected to the session might not be accessible.

    [#LC5188]

  • The Print Preview on Client option within Citrix Universal Print Driver displays to the local end point.

    [#LC5404]

Server/Site Administration

  • The changes made or values added to the registry key “HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main” created by the WfShell.exe process might not be preserved during logoff.

    [#LC4648]

Session/Connection

  • When resizing a reconnected session with a Citrix policy in place to prohibit session wallpaper and a Microsoft group policy in place that specified a wallpaper, the Citrix policy is not honored.

    [#LC0115]

  • When exiting a 64bit ThinAPP packaged application, the application can experience an unexpected exception on sfrhook64.dll.

    To prevent this, create following server-side registry key to resolve the issue:

    HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\CtxHook\AppInit_Dlls\SfrHook Name: SkipUnloadonProcessExit Type: DWORD Data: Any Value

    [#LC3484]

  • On systems with Hotfix ICAWS760WX86022 installed, attempts to reconnect to a user session might fail when you restart the Citrix ICA Service.

    [#LC3714]

  • With this enhancement, an entry is written to the Windows Event log when a USB device is redirected in a session.

    [#LC3996]

  • Using published instances of Microsoft Internet Explorer, attempts to download a file from a website and saving it to a mapped client drive (“Save as…”) can fail.

    [#LC4300]

  • In sessions on systems with Fix #LC1155 installed, an image display area inside a custom application is not resized properly if you resize the window manually.

    [#LC4319]

  • Audio files might fail to play in a VDA session when connected through Citrix Receiver for Mac or a Chromebook.

    [#LC4596]

  • After a network interruption between a VDA and Citrix Receiver, you cannot play back an .avi file on Windows Media Player.

    [#LC4670]

  • Time zone redirection might not work in user sessions running on iOS devices.

    [#LC4869]

  • After using the Remote Desktop Protocol, the ICA session might display a grey screen when reconnecting to the VM. This issue only occurs on VDAs installed with /NOCITRIXWDDM.

    [#LC4970]

  • A USB device might fail to work after it is redirected to Version 7.6.300 of the VDA. The issue occurs when the instance ID of the device is different from the serial number.

    To enable this fix, add the Product ID or Vendor ID pairs to the following registry key:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\icausbb\Parameters Name: UsingSerialNumberDevices Type: REG_MULTI_SZ Value: <Note: Next to the comments string, add the vid=xxxx and pid=xxxx pairs. (The syntax for the value is an ordered list of case insensitive rules where “#” is a line comment and each rule is an ordered vid and pid pair. For example, vid=#-number and pid=#-number. The maximum hex value for a vid/pid is FFFF. If the length of a vid/pid hex value is less than 4, pair the number with zeroes (0). For example, if the vid is 12 and pid is 13; the vid/pid pairs should be vid=0012, pid=0013. Each rule has a fixed length: 17, no spaces at the beginning or the end of the rule. Examples: #vid=FFFF, #pid=FFFF #vid=0012, #pid=0013.)>

    [#LC5035]

  • The svchost.exe process can consume 100% of the CPU.

    [#LC5041]

  • With Excelhook enabled and after applying hotfix ICATS760WX64028, the Excel window does not minimize when clicking the Excel icon in the taskbar.

    [#LC5060]

  • The svchost.exe process might fail intermittently on SCardHook64.dll when a user is logging on or off and Certificate Propagation is active.

    [#LC5083]

  • This fix addresses an issue that breaks client-side fetching for DirectShow based applications, preventing videos from rendering.

    [#LC5098]

  • Sessions might not disconnect, resulting in random VDA re-registrations.

    [#LC5122]

  • The operating system experiences an error on picadd.sys and a blue screen appears with bugcheck code 0xd5.

    [#LC5134]

  • An external USB DVD drive that is mapped into a session as a mapped client drive can cause slow session performance.

    [#LC5231]

  • COM port mapping can intermittently fail.

    [#LC5235]

  • The following counters in the performance monitor might display inconsistently.
    - \ICA Session\Input Session Bandwidth - \ICA Session\Output Session Bandwidth The issue occurs only when the count value is high.

    [#LC5262]

  • The operating system experiences an error on picadd.sys and a blue screen appears with bugcheck code 0x3b.

    [#LC5299]

  • The VDA might become unresponsive at the “Welcome” screen due to a deadlock on picadm.sys.

    [#LC5326]

  • With Special Folder Redirection enabled, published applications might fail to launch and the following error message appears:

    “The Citrix server is unable to process your request to start this published application.”

    [#LC5593]

  • After upgrading a VDA from Version 7.6.300 to Version 7.6 LTSR Cumulative Update 1, launching of applications might be slow or can fail.

    [#LC5661]

  • Attempts to save a published Microsoft Excel spreadsheet to a Chromebook device might fail. The issue occurs because the file extension is not present.

    [#LC6001]

Smart Cards

  • The Sign-in option does not appear on Version 7.6.300 and later VDAs running on Windows 10 Build 10586 and later. As a result, smart card logons are not possible.

    [#LC4778]

  • XenDesktop smart card sessions might randomly disconnect.

    [#LC5265]

  • Attempts to log on by using certain smart cards might result in the following error message:

    “No valid certificates were found on this smart card. Please try another smart card or contact your administrator.”

    [#LC5456]

System Exceptions

  • The operating system experiences an error on picadm.sys and a blue screen appears with bugcheck code 0x50.

    [#LC4529]

  • The operating system experiences an error on picadm.sys and a blue screen appears.

    [#LC4567]

  • A non-handled exception copying from USB devices might cause the operating system to experience an error and a blue screen appears.

    [#LC4782]

  • A published application process might exit unexpectedly with an exception “c000041d” on MobileDesktopHook64.dll.

    [#LC4821]

  • When you log on to a VDA running on Windows Server 2008 R2 through a remote desktop and launch certain third-party applications, the applications might exit unexpectedly.

    [#LC5891]

User Experience

  • When you switch from a touch-optimized published desktop to a regular published desktop, the Start button:

    • Does not highlight when you hover over it
    • Brings up the local desktop instead of the published desktop

    [#LC3466]

  • Certain .wmv files might not play at the correct aspect ratio.

    [#LC4695]

  • Connecting to audio recording/dictation software during an ICA session might cause the software to exit unexpectedly.

    [#LC5407]

User Interface

  • After publishing seamless applications, the generic Citrix Receiver icon may appear instead of the published app icon in the taskbar.

    [#LC4757]

Fixed issues

In this article