Uniprint custom virtual channel cannot be opened
Article ID: CTX473067
Updated On:
Description
Issue with Uniprint
Event viewer error: Custom virtual channel CTXUNPR cannot be opened by process C:\Program Files\UniPrint Suite\UPSession.exe 
Environment
Caution! Using Registry Editor incorrectly can cause serious problems that might 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. Be sure to back up the registry before you edit it.
Resolution
Add CTXUNPR,C:\Program Files\UniPrint Suite\UPSession.exe to the Virtual Channel allow list policy in Studio
Check registry to confirm:
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Policies\Citrix\VCPolicies CTXUNPR,C:\Program Files\UniPrint Suite\UPSession.exe
Check registry to confirm:
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Policies\Citrix\VCPolicies CTXUNPR,C:\Program Files\UniPrint Suite\UPSession.exe
Problem Cause
Custom virtual channel allow list
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