I am using Creo Simulate 2.0 M160
After creating a shell pair with the prt file inside the analysis target and confirming that the mesh was created correctly with AutoGEM, When AutoGEM is executed on the asm file to be analyzed, AutoGEM is interrupted with the error "The shell pair may not be defined correctly".
Here are the errors that I faced : The shell pair may not be defined correctly
Try to open a support "Case", here: https://www.ptc.com/en/support/case-logger