Turn on the Advanced Rules Editor in both TM1 and Cognos Express!
It makes editing and creating rules sooo much easier! Find tm1p.ini in:
C:\Users\YourUserName\AppData\Roaming\Applix\TM1C:\Users\YourUserName\AppData\Roaming\Applix\TM1 (note this is a hidden folder so you will need to type “\appdata” once you navigate to YourUserName and then continue to navigate to the correct folder).
Here you should change AdvancedRulesEditor to be “T” rather than “F” and save the file.
As the Advanced Rules Editor change is a client setting, there is no need to restart the TM1 server, just close and open the client again.