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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 ?
My question is how to use TCL scripts to swap master-slave surface. Like the figure attached, I want to swap master-slave surface of those highlighted contact pairs. I want to use Young's modulus to decide which surface should be master, and the other to be slave. Master surface should have higher Young's modulus. So, how can I write this if statement and swap the master-slave surface? My model is also uploaded, and I have created the contact pairs. But the contact pairs have'nt been swapped. raw.hm