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Hello, I'm trying to use a nonlinear material (MATS1) in topology optimization which is resulting in the following error: *** ERROR # 4650 *** The design space for topology/freesize optimization can not contain nonlinear material. --- Is there any way to use a nonlinear material in topology optimization or is it currently not supported? I'm using HyperWorks 2017.2 with the following hotfixes: HyperWorks Desktop 2017.2.1 HyperWorks Solver 2017.2.2 Thanks in advance Manmit