Citrix states in their article: CTX086028

CTX086028 - Troubleshooting Client Clipboard Issues

This document was published at: http://support.citrix.com/kb/entry.jspa?externalID=CTX086028

Document ID: CTX086028, Created on: Apr 12, 2002, Updated: Dec 30, 2003

Products: Citrix MetaFrame XP 1.0 for Microsoft Windows 2000, Citrix MetaFrame XP 1.0 for Microsoft NT 4.0 Server Terminal Server Edition, Citrix MetaFrame 1.8 for Microsoft Windows 2000, Citrix MetaFrame 1.8 for Microsoft NT 4.0 Server Terminal Server Edition

Follow the troubleshooting steps below.

Overall Limitations

As of MetaFrame XP Service Pack 2 and MetaFrame 1.8 Service Pack 3, features similar to RDPClip.exe, outlined in Microsoft TechNet article Q309825, support to drag and drop to/from seamless Windows Explorer in ICA session to/from Windows Explorer on clients local desktop, and Copy and Paste from two unique ICA sessions are not available. For the last item, the first session must be copied to the local workstation and then recopied from the local workstation to the second unique session.

General Troubleshooting Steps

1. Start Citrix Connection Configuration.

Highlight the ICA-TCP port and go to Connection > Edit.

Click the Client Settings tab.

In the Client Mapping Overrides section on the right, check to see if Disable Client Clipboard Mapping is checked. If it is and you want the clipboard to map, uncheck the checkbox. If the checkbox is not checked, go to Step 2.

2. If you look at a users session in Citrix Server Administration or Terminal Server Administration, is Wfshell.exe running? If not, run regedt32.

WARNING! Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Citrix cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk. For information about how to edit the registry, view the "Changing Keys and Values" Help topic in Registry Editor (Regedit.exe) or the "Add and Delete Information in the Registry" and "Edit Registry Data" Help topics in Regedt32.exe. Make sure you back up the registry before you edit it. If you are running Windows NT, also update your Emergency Repair Disk (ERD).

Go to this registry key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\WinLogon

In the Value of AppSetup, is Cmstart.exe present? If not add it.

appsetup: REG_SZ: cmstart.exe

Cmstart.exe is a process that runs when you log on to the MetaFrame server. It is associated with Wfshell.exe. In addition, only for Window NT 4.0 Terminal Servers, ensure the USERINIT string value contains wfshell.exe.

3. Verify that the registry includes a subkey under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Citrix\Wfshell named Virtual Clipboard and the subkey has two values: DllName and NotifyEvent, both of type REG_SZ and respective entries of Vclipbd.dll and WfshellVclipbdNotify.

4. Verify Vclipbd.dll is on the system drive.

General Clipboard Contention Issues

The open clipboard call failed due to contention with Wfshell, a Citrix utility that enables cut and paste operations amongst the client and server. This problem was reproduced using Microsoft Excel 97 but was also present with other applications.

It is now possible to configure the server in such a way that if an open clipboard call fails, the system retries to open the clipboard a specified number of times or until the open is successful. It is also possible to configure a delay in milliseconds between each clipboard open retry. The following procedure describes how to enable this feature for a given application:

1. Create the following registry key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\Current Version\Terminal Server\Compatibility\Applications\{app name}

where {app name} is the name of the application without the extension.

2. Add the following registry values to the above registry key:

OpenClipboardRetries: REG_DWORD: 0x20
OpenClipboardDelayInMilliSecs: REG_DWORD: 0x50
Flags: REG_DWORD: {num}

where {num} is the application type. Possible values are:

DOS application 0x1
OS/2 application 0x2
Windows 16-bit application 0x4
Windows 32-bit application 0x8
Win16 and Win32 applications 0xC
Any version 0xF

When testing Excel 97, the above settings worked well for Excel (32 retries with a 256 millisecond delay between each). If applications on the ICA Client device and the MetaFrame server are actively accessing the clipboard simultaneously, it may be necessary to increase the settings for "OpenClipboardRetries" and "OpenClipboardDelayInMilliSecs."

3. Restart the application for the new settings to take effect.

Ceridian Runtime Error 521: Unable to Open Clipboard

Pasting into an ICA or RDP session may fail from workstations running Marimba

How to Disable the Clipboard on a Per-Client Basis

How to Disable the Clipboard on a Per-Client Basis

How to add a Custom Clipboard Format to a MetaFrame Server

Certain applications introduce custom clipboard formats that cannot be copied from the local workstation and pasted into an ICA session. Additional testing showed that the same application will copy and paste properly into an RDP session. Citrix has added support for these custom clipboard formats.

The hotfix requires the appropriate service pack level to be installed. From the ME183W011 hotfix readme:

"Provides a way to add custom clipboard formatting from the registry. Add the following registry value to add a custom clipboard format called "MyCustomFormat" to a supported ICA clipboard format.

"WARNING! Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Citrix cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk. Make sure you back up the registry before you edit it. If you are running Windows NT, also update your Emergency Repair Disk (ERD).

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Citrix\wfshell\Virtual Clipboard\Additional Formats\MyFormat1 Name REG_SZ:MyCustomFormat

For example:

To add ETOS_Native as supported format, add the following to the registry:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Citrix\wfshell\Virtual Clipboard\Additional Formats\ETOS_Native

ValueName:Name
Data Type:REG_SZ
Value: ETOS_Native

Another example is the “Paste Special” option within Microsoft Office.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Citrix\wfshell\Virtual Clipboard\Additional Formats
/>
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Citrix\wfshell\Virtual Clipboard\Additional Formats\CF_HTML

"Name"="CF_HTML"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Citrix\wfshell\Virtual Clipboard\Additional Formats\HTML Format

"Name"="HTML Format"

You need hotfix MetaFrame 1. 8 for Windows 2000 SP3 and ME183W011; ME183T004 for MetaFrame 1.8 SP3 for TSE4.0 or MetaFrame XP SP2 for Windows 2000 and TSE 4.0.

Pasting Too Much Text from Macintosh Clipboard to Client Session Causes Macintosh Workstation to Lock Up

To increase the amount of memory allocated to the Citrix ICA Client:

1. Go to the binary file Citrix ICA Client within the finder. Make sure it is not an alias; an alias has an italicized name instead of normal text.

2. Highlight the icon.

3. Press the Command Key + I. This opens up the Information window for the binary (the Command Key is the one with the apple icon).

4. Depending on what system software you have loaded, you might have to choose a Memory sub-window.

5. Find the memory allocation fields, Minimum Size and Maximum Size, and change both of them to 8000K.

Pasting from Citrix Session to a local Macintosh Application Carries over a Null Character

REPRODUCTION

1. Launch a published application, MS Word, from the Macintosh workstation.

2. Launch "Simple text" on the Macintosh Workstation

3. From the published application, Highlighted text (the word:"test1"), selected copy from toolbar.

4. On local Macintosh Workstation, Focus on the "Simple Text" window, From Toolbar selected paste. Observe, clipboard item is pasted locally(the word:"test1").

5. From the end of the pasted text, (the word:"test1"), in order to delete last character("1") you must use the delete key twice. The first to delete the "Null" character and the second to delete the character "1".

6. If steps 1-5 are used with another type of text engine on the Macintosh, Quark, the issue is not seen.

7.Customer had a script running on the workstation that strips off the extra characters.

CAUSE

The server is sending a trailing null character and our clipboard handling code passes this on to the Macintosh OS. This was introduced when Unicode clipboard support was added to the Client. Some applications running on the MAC strip the extra null character, e.g. Word, but others will not, e.g. SimpleText.

RESOLUTION

Contact Citrix Technical Support if the latest Citrix ICA Client for Macintosh does not resolve this issue.