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Dear STKO team,

I am getting the strange error in the analysis as shown in the attachement. Kindly let me know the way to resolve this error.

Thank you.

Hi, You might be using STKO new version 4.0.0, but not compatible OpenSees exe? Did you install the new OpenSees version 3.7.0 from Prof. Nicola's researchgate page? Please download and install it on your PC. Link given below. Let me know if the error persists. https://www.researchgate.net/publicatio ... r_OpenSees

I am using updated version of opensees and STKO. But the error is not resolved.

Ok, the first figure from your post indicates there could be convergence issue, but the actual error should have been just above the first line (saying, "process terminating 0") in that figure. You can check the specifics there.