Include CMSMETH card inside a SUBCASE.

I am trying to do model reduction using craigh brampton method. The process is valid for a small model. However, I need to work on the complex model.

In that model I am getting the following error. Please provide some suggestion.

*** ERROR # 2981 ***
 Both SUBCASE and CMSMETH are present in this model.
 However, none of the SUBCASE refer to CMSMETH card.
 Include CMSMETH card inside a SUBCASE.