We are facing ThinPrint issue post upgrading VDA to 2203 CU2 version
Article ID: CTX482614
Updated On:
Description
After upgrading from 1912 CU5 to 2203 CU2 and VDAs to Server 2016, a ThinPrint error message is seen:
"Error while opening Virtual Channel" while printing.
This issue does not exist on all the 2016 machines on which VDA is upgraded.
1912 CU5 VDAs all remain unaffected.
Resolution
- Set "Virtual channel allow list" to "Disabled"
- Alternatively, the two above processes need to be added to the Allow list:
C:\Program Files\Common Files\ThinPrint\TPAutoConnect.exe,C:\Windows\System32\spoolsv.exe
Problem Cause
From VDA 2109 and later, the "Virtual channel allow list" is Enabled by default.
When enabled, only Citrix virtual channels are allowed.
When disabled, all virtual channels are allowed.
Issue/Introduction
Virtual channels for third party need to be configured
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