Hi Array ,nThank you for this post as it helped us troubleshoot this issue. We have a setup which requires both ANSYS 2020 R1 and Aspen Plus 11 to be installed.nRemoving or renaming the specific DLL, C:\Windows\System32\svml_dispmd.dll, fixed this problem for us. This DLL is not needed in how we use Aspen Plus.nWe had a similar problem with Fluent several months ago and had to use a similar fix but with a different DLL.nProbably not possible, but it would be great to have an option that tells the ANSYS apps to ignore external libraries.nThanks!n