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Hi, I am running a Frequency Response Analysis. When I change the EIGRL entry to EIGRA, I get following error. *** ERROR # 3432 *** Singularity found in construction of constraint equations. Usually this happens when a dof is defined as slave in more than one constraints. For inertia relief analysis this problem may be overcome with SUPORT definitions and/or PARAM,COUPMASS,1. This error occurs in module "asmbdrv". How this can be resolved ?