P6 Web Services Randomly Fails With the Error "Error While Trying to Validate Session Using Cookie Authentication: Invalid Session. Please Login Again"

(Doc ID 2368880.1)

Last updated on MARCH 02, 2018

Applies to:

Primavera Web Services - Version and later
Primavera P6 Enterprise Project Portfolio Management Cloud Service - Version and later
Information in this document applies to any platform.


When making multiple P6 Web Services requests, the following error occurs,

Error while trying to validate session using cookie authentication: Invalid session. Please login again.

The issue can be reproduced at will with the following steps:
1. Call Login method from the Authentication service
2. Make several ReadProjects requests
3. Randomly the ReadProjects request call will fail




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