Query to check users who have been logging into the Erwin r9 Mart or who have current sessions running Matt Russo Updated June 30, 2017 20:39 Follow Select a.Username,b.S_Machine,b.S_Start,b.S_EndFrom m9User a,m9Session bWHERE a.UserId = b.U_Id Related articles Is there a query that will give me all the library, model, and table names for an r9.6 and later mart? erwin Data Modeler 9.7 Product Documentation If I have erwin Data Modeler 32-bit and 64-bit, should I have the erwin MartServer 32-bit or 64-bit installed? I am unable to save my model changes after being logged into the mart for a couple of hours. I get the error, CA ERwin DM ! You do not have a valid Mart session to complete this operation. Unknown error with the mart server Comments 0 comments Please sign in to leave a comment.