I am facing the problem the having the error of "summation load cases needed for recalculation" when running the anaylysis files in RM V10 advanced
Pardeep,
The best place to ask questions about your Bentley products is the respective forum. In this case for RM, you can use this forum:
communities.bentley.com/.../5930
You need to introduce the name of the summation load case defined in the load management table, in the selected rectangular. Please, if you have any more doubts send us a service request.