Product Documentation

Fixed issues

Sep 23, 2016

The following issues have been fixed since Version 7.9:

Citrix Policy

  • 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]

Citrix Studio

  • 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]

  • Microsoft Management Console might become unresponsive when adding machines to the Catalog.

    [#LC5334]

  • When a Delivery Controller goes offline or becomes otherwise unavailable, Citrix Studio might operate slowly.

    [#LC5335]

  • After upgrading XenApp or XenDesktop to 7.7 from 7.6, a prompt to upgrade might occasionally appear in Citrix Studio.

    [#LC5478]

  • When you close and then attempt to reopen an instance of Version 7.9 of Citrix Studio that is configured with App-V servers containing many packages, Studio remains in an expanding state and fails to open.

    [#LC5643]

Controller

  • 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]

  • Controllers occasionally lose connectivity with the database when there is a high number of apps and VDA processes running. When that happens, VDAs remain in the initialization state and applications are unavailable.

    [#LC4848]

  • When there are too many hypervisor alerts, the SQL database server's CPU usage can reach 100%.

    [#LC5277]

  • Under high utilization conditions (more than 5,000 users launching numerous apps on numerous VDAs for Server OS concurrently), the SQL database server's CPU usage can reach 100%, which causes outages and apps are unable to launch.

    [#LC5315]

  • 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]

  • When you close and then attempt to reopen an instance of Version 7.9 of Citrix Studio that is configured with App-V servers containing many packages, Studio remains in an expanding state and fails to open.

    [#LC5643]

HDX MediaStream Flash Redirection

  • With SSL enabled in a remote desktop session, Microsoft Internet Explorer might exit unexpectedly, referencing pseudoserverinproc2.dll.

    [#LC5150]

  • With HDX MediaStream Flash Redirection enabled, flash videos might fail to play on MSN.com.

    [#LC5152]

Universal Print Server

Server

Server

  • Attempts to print from Microsoft Internet Explorer might fail with the following error message when using the Citrix Universal Print Driver:

    "There was an internal error and Internet Explorer is unable to print this document."

    [#LC4735]

Desktop Studio

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

    [#LC5427]

HDX 3D Pro

  • With HDX 3D Pro enabled, customized mouse pointers in 3D graphics rendering applications might appear incorrectly.

    [#LC4713]

HDX Broadcast

  • HDX audio devices might be randomly disabled when starting a session.

    [#LC5281]

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]

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]

Logon/Authentication

  • If the Windows Remote Desktop Session Host Configuration policy setting "Always prompt for password upon connection" is enabled, when users log on to VDA 7.x by using the ICA protocol, users receive a prompt to enter their credentials again.

    To enable this fix, set the following registry key:

    HKEY_LOCAL_MACHINE\Software\Citrix\Portica
    Name: AutoLogon
    Type: DWORD
    Data: 0x00000001 (value must be between 1 and 2147483647)

    Note: The Citrix Display Drive can be marked for deletion if there are multiple attempts to run the MSP file. This causes the installation of the hotfix to fail. In addition, the display resolution of the VDA might not work. To allow this to work, restart the VDA and then install the hotfix again.

    [#LC1180]

Printing

  • The Citrix Printer Manager Service (Cpsvc.exe) might exit unexpectedly with an access violation error.

    [#LC4665]

  • 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

  • When launching VM hosted apps, the Windows logon screen might appear before the app is fully launched. This fix introduces a 15-second grace period before the Welcome screen appears. It also provides support for the following registry key that allows you to customize the duration of the grace period.

    Note: During the grace period, there is no obvious indication to users that the app is launching. Configuring too high a grace period can delay application launches and cause users to inadvertently launch apps multiple times.

    To change the duration of the grace period, set the following registry key:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Citrix\wfshell\TWI
    Name: LogonUIHideTimeout
    Type: DWORD
    Value: Any value greater than zero in milliseconds (for example, 20000 milliseconds for 20 seconds)

    [#LC3828]

  • The Output Session Bandwidth Performance Monitoring counter might report inconsistent values upon recording for a long period of time.

    [#LC4151]

  • If you are logging on to a Version 7.6.300 VDA with explicit credentials (username/password) and User Account Control (UAC) enabled, and then attempt to authenticate to an application running in the session using a smart card, the following error message might appear:

    "An authentication error has occurred. No credentials are available in the security package."

    [#LC4486]

Session/Connection

  • 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]

  • The Citrix policy "View window contents while dragging" does not work correctly.

    [#LC3552]

  • Disconnected sessions might remain open on a physical machine even after the time specified under "Disconnect session timer interval" has passed.

    To enable the fix, set the following registry keys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\Portica
    Name: ForceDisableRemotePC
    Type: DWORD
    Value: Any value greater than zero

    [#LC3650]

  • If an endpoint loses network connectivity for several minutes, reconnection attempts can fail until the VDA is restarted.

    [#LC3700]

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

    [#LC3714]

  • When logging on to a VDA after it is in an idle state for an extended period of time, the credentials might not be passed through automatically to the logon screen upon reconnection and a prompt to enter the password appears on the logon screen.

    [#LC3720]

  • The "Restrict session clipboard write" and "Restrict client clipboard write" policies do not work properly for sessions using Citrix Receiver for Android. As a result, users can copy and paste content between the session and the user device regardless of the configuration of those two policies.

    [#LC3894]

  • 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]

  • When you attempt to reconnect to a disconnected session, a Windows lock screen appears with a set of keys but without an option to enter your password. When you click "Other credentials," a second credentials icon appears that allows you to enter the password and unlock the session.

    [#LC4053]

  • Sessions running on Version 7.6.300 of the VDA for Desktop OS with RES Workspace Manager installed can become unresponsive when roaming sessions between user devices.

    [#LC4570]

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

    [#LC4596]

  • 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 from Version 5.6.300 to Version 7.6.300 of the VDA, VDAs can become unresponsive.

    [#LC4851]

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

    [#LC4869]

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

    [#LC5041]

  • A VDA might experience a fatal exception of type 0x50 (Page_Fault_In_NonPaged_Area) on Citrix display driver vdodk.sys.

    [#LC5074]

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

    [#LC5083]

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

    [#LC5134]

  • 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]

  • With Framehawk enabled, the scroll button on a mouse might not perform any action in a XenDesktop 7.8 VDA session. The corresponding VDA side fix is available in XenDesktop 7.9.

    [#LC5302]

  • If the Client USB device redirection rules policy contains more than 1,000 characters, all USB drives are redirected, even if there is a deny rule for the device.

    [#LC5457]

  • After reconnecting to a disconnected multiple monitor session, the display screens turn black and custom settings revert to the defaults.

    [#LC5556]

Smart Cards

  • 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]

  • VDAs can experience a fatal exception on picadd.sys, displaying a blue screen, upon logoff from a Citrix Receiver session.

    [#LC4360]

  • VDAs can experience a fatal exception with bugcheck code 0x00000044 on ctxdvcs.sys and a blue screen appears.

    [#LC4505]

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

    [#LC4529]

User Experience

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

    [#LC4797]

  • If you open a spreadsheet in Excel 2010 with more than one workbook, the taskbar displays only the most current workbook.

    [#LC5370]

  • Connecting to dictation software might cause that software to exit unexpectedly.

    [#LC5407]

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]

Printing

  • The Citrix Printer Manager Service (Cpsvc.exe) might exit unexpectedly with an access violation error.

    [#LC4665]

  • 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

  • When launching VM hosted apps, the Windows logon screen might appear before the app is fully launched. This fix introduces a 15-second grace period before the Welcome screen appears. It also provides support for the following registry key that allows you to customize the duration of the grace period.

    Note: During the grace period, there is no obvious indication to users that the app is launching. Configuring too high a grace period can delay application launches and cause users to inadvertently launch apps multiple times.

    To change the duration of the grace period, set the following registry key:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Citrix\wfshell\TWI
    Name: LogonUIHideTimeout
    Type: DWORD
    Value: Any value greater than zero in milliseconds (for example, 20000 milliseconds for 20 seconds)

    [#LC3828]

  • The Output Session Bandwidth Performance Monitoring counter might report inconsistent values upon recording for a long period of time.

    [#LC4151]

  • When a VDA for Server OS is unregistered or the Citrix Desktop Service is disabled, even domain administrators cannot log on to that VDA through a Remote Desktop (RDP) connection. While that behavior is as designed for non-administrator roles, administrators are expected to be able to log on.

    [#LC4290]

  • If you are logging on to a Version 7.6.300 VDA with explicit credentials (username/password) and User Account Control (UAC) enabled, and then attempt to authenticate to an application running in the session using a smart card, the following error message might appear:

    "An authentication error has occurred. No credentials are available in the security package."

    [#LC4486]

  • Live scrolling (the synced state of page scrolling and scrollbar motion) does not work in Excel spreadsheets. Version 7.6.300 of the VDA introduced Fix #LC2965, intended to address the issue. However, Fix #LC2965 does not fully resolve the issue in all cases. This Fix, #LC4579, ensures that the issue is corrected even on systems where Fix #LC2965 does not work.

    From the description of #LC2965:

    Live scrolling (the synced state of page scrolling and scrollbar motion) does not work in Excel spreadsheets. The issue occurs because the key and value in registry location HKEY_CURRENT_USER\Control Panel\Desktop\UserPreferencesMask on the VDA are overwritten by the wfshell.exe process each time a user logs on to the VDA. To prevent this, create the following registry key on the VDA and set the value to 1:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Citrix
    Name: EnableVisualEffect
    Type: REG_DWORD
    Value: 1

    [#LC4579]

  • 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]

  • After installing Hotfix ICATS760WX64022 (or its replacements), any new custom registry configuration under the registry key HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\Graphics\ might not be retained when you restart the system.

    [#LC4931]

Session/Connection

  • The Source Network Address displays an incorrect IP address for remote user devices in the server's Windows Security Log with EVENT ID 4624.

    [#LC1352]

  • In Citrix Receiver for Android published desktop sessions, attempts to open a Microsoft Outlook calendar invitation can fail with the following error message:

    "Cannot open item"

    The issue occurs with calendar invitation created by other users; invitations created by the same user are not affected.

    [#LC2828]

  • In certain scenarios, the Client Printer Redirection and Citrix Group Policies' Access Control filters might fail to work while logging on or reconnecting to a disconnected session.

    [#LC3083]

  • 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]

  • The Service Host (svchost.exe) process that is registered with Terminal Services (TermService) might close unexpectedly on RPM.dll while connecting to a server through an RDP session.

    [#LC3808]

  • The "Restrict session clipboard write" and "Restrict client clipboard write" policies do not work properly for sessions using Citrix Receiver for Android. As a result, users can copy and paste content between the session and the user device regardless of the configuration of those two policies.

    [#LC3894]

  • When a connection to a Windows Server 2008 R2 VDA fails due to a license error, the error message "You cannot access this session because no licenses are available" fails to appear.

    [#LC4026]

  • After logging off of a newly installed Feature Pack 3 VDA for Server OS (7.6.300), Citrix Studio might display that VDA's status as "initializing" rather than "registered." During that time, no new sessions will be brokered for that VDA.

    [#LC4188]

  • With Application Prelaunch enabled, a black window might appear temporarily on the user device. The issue can occur when you start Citrix Receiver without launching an application.

    [#LC4280]

  • When launching an application in a VDA 7.6.300 session, progress bar with the following message might appear for several minutes before the application launches: "Please wait for Local Session Manager." In the meantime, the application appears to be unresponsive even though it is launching correctly.

    [#LC4406]

  • When connecting through the NetScaler Gateway, the SmartAccess Control filters might not be applied correctly.

    [#LC4503]

  • The presence of non-ASCII characters in a published application path prevents the application from launching.

    [#LC4595]

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

    [#LC4596]

  • With the "Auto Client Reconnect" policy enabled, attempts to reconnect to a session can fail intermittently and cause the VDA to reregister. The following warning message appears:

    "Event 1048, Citrix Desktop Service (Warning)

    The Citrix Desktop Service is re-registering with the DDC: "NotificationManager:NotificationServiceThread: WCF failure or rejection by broker (<DDC: DDC NAME>)""

    [#LC4767]

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

    [#LC4869]

  • Excel files might become corrupted when they are overwritten in an ICA session with CDM option setting (CacheTimeout=0).

    [#LC5026]

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

    [#LC5041]

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

    [#LC5083]

  • 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]

  • 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]

  • With Framehawk enabled, the scroll button on a mouse might not perform any action in a XenDesktop 7.8 VDA session. The corresponding VDA side fix is available in XenDesktop 7.9.

    [#LC5302]

  • If the Client USB device redirection rules policy contains more than 1,000 characters, all USB drives are redirected, even if there is a deny rule for the device.

    [#LC5457]

Smart Cards

  • 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 Service Host (svchost.exe) process that is registered with Terminal Services (TermService) might exit unexpectedly.

    [#LC4150]

  • VDAs can experience a fatal exception on picadd.sys, displaying a blue screen, upon logoff from a Citrix Receiver session.

    [#LC4360]

  • VDAs can experience a fatal exception with bugcheck code 0x00000044 on ctxdvcs.sys and a blue screen appears.

    [#LC4505]

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

    [#LC4529]

User Experience

  • If you open a spreadsheet in Excel 2010 with more than one workbook, the taskbar displays only the most current workbook.

    [#LC5370]

  • Connecting to dictation software might cause that software to exit unexpectedly.

    [#LC5407]

Miscellaneous

  • After publishing the application write.exe, an extra line appears on top of the write icon on the web page.

    [#LC1298]