Failed to launch session "session_name". Error code: 2502 on Citrix Workspace App During App/Desktop Launch

Failed to launch session "session_name". Error code: 2502 on Citrix Workspace App During App/Desktop Launch

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Article ID: CTX255861

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Updated On:

Description

This article is intended for Citrix administrators and technical teams only.
 
Non-admin users must contact their company's Help Desk/IT support team and can refer to CTX297149 for more information.

 

The following error is returned by the Citrix Gateway to Citrix CWA app when application/desktop launch fails:
Failed to launch session <session_name>. Error code: 2502

Resolution

This error indicated that backend VDA is unreachable for Enlightened Data Transport. 

To resolve this issue check firewall rules for UDP reachability to VDA,