Citrix Workspace App for Windows crash due to .NET 9.0.5

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Article ID: CTX693370

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Updated On:

Description

If you have any Current Release of Citrix Workspace App 2409.10 or higher, or LTSR version 2402 CU3 or higher and .NET Desktop Runtime 9.0.5 installed, receiver.exe could crash post session launch. Post crash, the systray icon would show up only two options - Open and Exit.

Environment

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Resolution

Workaround

If you have both .NET Desktop Runtime 8.0 and .NET Desktop Runtime 9.0.5 installed on the machine, recommend uninstalling .NET Desktop Runtime 9.0.5 if not used by any other application. This will ensure CWA will bind to .NET Desktop Runtime 8.0.

Please note that CWA uses the x86 version of Desktop Runtime. Hence, check the dot net version in the x86 folder.
Eg: "c:\Program Files (x86)\dotnet\dotnet.exe" --list-runtimes

Problem Cause

CWA uses .NET roll-forward and binds to a higher version (e.g., 9.0.5) if both .NET 8 and .NET 9.0.5 are present. Since .NET Desktop Runtime 9.0.5 has changes breaking backward compatibility with CWA’s receiver.exe, this leads to the crash. More details on the breaking changes of .NET Desktop Runtime 9.0.5 are mentioned at https://learn.microsoft.com/en-us/dotnet/core/compatibility/9.0

Issue/Introduction

CWA crash due to .net

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