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I also ran into this error. I believe the error is not yet solved by developers and is not your mistake. It occurs when you compiled opensees.exe in debug mode and then oerform an eigenanalysis. Compile in release mode, that should work. The error occurs in OpenSees-master\OTHER\ARPACK\dsaupd.f in l...

Update: The material "ElasticIsotropic3D" should be used. This material is not mentioned in the manual. Additionally, the ZeroLengthND element is not able to provide rotational stiffness. In this link you can find how to fix this, you need to be able to compile the OpenSees source code how...

Dear user, I am trying to incorporate the ElasticIsotropic material into a zerolengthND element.The reason i don't use uniaxial materials is because I want to create a single material in a single element that behaves based on input forces in all DOF. I can not find any examples nor information on th...