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P6 Web Services and Integration API Errors: "Invalid database instance while checking authentication mode" and "YOUR DATABASE MAJOR SCHEMA VERSION DID NOT MATCH THE VERSION EXPECTED BY PRIMAVERA" (Doc ID 1634957.1)

Last updated on MAY 22, 2023

Applies to:

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


The following error occurs when logging into the P6 Integration API or Web Services:




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