Error: "TCVirtualTable.ExistInDB: table=User Session), Sql=() Exception=(Stream Read Error)" When Using the P6 Professional Client for Cloud Connect

(Doc ID 2266266.1)

Last updated on MAY 23, 2017

Applies to:

Primavera P6 Enterprise Project Portfolio Management Cloud Service - Version 17.3 and later
Information in this document applies to any platform.


When logged into the P6 Professional Client for Cloud Connect the following error is observed:

"TCVirtualTable.ExistInDB: table=User Session), sql=() Exception=(Stream read error). "

followed by:

"Your user session has expired. Please talk to your administrator about changing your timeout settings"

followed by:

"You have lost the access to database. Please restart the application"

followed by:

"TCVirtualTable.ExistInDB: table=User Session), sql=() Exception=(Stream readerror), sql (Select wbs_id from projwbs WHERE wbs_id=xxxxxx "

Followed by:

"WBS 'UT_PROJECT' was deleted by another user"


  1. Log-in to P6 Professional for Cloud Connect
  2. Wait for period of time
  3. Observe errors


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