A Scheduled Updates file update fails with the error message "@@Analysis changed in the library, will attempt to update again" seen in the "Scheduling & Routing" > "Activity" tab. For example:
This message will be seen when the analysis has been updated in the library which causes that message to be displayed, and the report is being updated again. For example, consider an analysis file using a Data Connector which does not have the credentials saved with the connection which is then added to a Scheduled Updates file rule. This file will fail to load in Scheduled Updates since there are no credentials for the data connection. If the report is then edited, by editing the data connection and saving the credentials stored with the connection, and the report is then saved back to the library, then this "@@Analysis changed in the library, will attempt to update again." message would be displayed.