One need to insert a command object for each part with a /input of the file that has the TB,MATID commands in it. An alternative that requires only a single command object for a multiple part model. Create a body named selection for those parts. hen insert a command object under the environment like this. fini /prep7 cmsel,s,named_selection ! replace named selection with your named selection *get,maxmat,mat,,num,max *do,jj,1,maxmat *get,cmat,elem,elnext(0),attr,mat tb,cmat, ! swelling values ! esel,u,mat,cmat *get,ec,elem,,count *if,ec,eq,0,exit *enddo allsel cmsel,all fini /solu