Different customers have reported cases where ASNYS Workbench applications were not working as expected. Such cases were for exapmple: – ANSYS Meshing failing with an error message: “The mesh generation did not complete due to poor quality elements or incorrect input. Please try meshing with another mesh method or different mesh options”. This error message was appearing with each geometry, even with the simplest (cube). – ANSYS Explicit Dynamics simulations stopping immediately after the start of the run without any warning or error message. It turned out that recent ANSYS Wokbench had been installed on machines where siginficantly older versions of other CAE/CAD applications had been installed. For instace, in the case of the failing ANSYS Meshing application, ANSYS 19.x (released in 2018) packages and AutoCAD 2013 were installed on the same machines – the problem was occuring on all machines. This old AutoCAD release and also other older CAD/CAE programs copy their DLL files into C:/Windows/System32. ANSYS can have DLL files with the same names (which are however located in C:/Program Files/Ansys Inc/v19.x) – in such cases it uses however the DLLs from the Windows directory instead its own files. Very old DLLs in the C:/Windows/System32 can be incompatible with the recent ANSYS versions, which can cause the unexpected behaviors such as those described above. Identification of old foreign DLL files in C:/Windows/System32 can be a challenging task. In such cases, installing ANSYS on a machine without CAD/CAE applications older more than 3-4 years than the ANSYS release might be a more efficient way to bypass the problem.