Hello guys,

I am currently working on Abaqus substructures in which I am trying to perform a free free modal analysis of a big assembly with 5 sub assemblies in it.

Assembly description:

1. To reduce my analysis time, I have generated Dynamic (frequency based) substructures of the subassemblies
2. I have recalled the substructure of the generated subassemblies using * ELEMENT command into the main assembly bulk and have setup the deck for modal analysis using * FREQUENCY command.

Problem Faced:

1. I tried to run the setup for 20 modes using AMS eigen solver without requesting the residual modes in * FREQUENCY step and the analysis runs fine.
2. But, when I am trying to run the same setup with requesting the residual modes in the frequency step the analysis terminated without any warning or error. 
3. The .dat file has been written only till the *ELEMENT command line which was used for recalling the first substructure in the main bulk assembly.
4. Also, note that I have already recalled the residual modes for individual substructures in their generation stage.
5. The problem is specific to the request of residual modes in the main free free modal run.

Things I tried,

1. Using single and multiple cores for running the study.
2. Using LANCZOS solver.

I and my team is stuck with the issue for several days. I therefore humbly request members of the SIMULIA community who might have worked on substructures to kindly help me out with the problem.