Ensure you have a stable VPN or LAN connection if using a network license.
Run the "Mesh Repair Wizard" to find overlapping elements or zero-area faces. autodesk moldflow error 99998 best
Re-import the .udm file. This often strips away hidden corruption in the original project database. Ensure you have a stable VPN or LAN
If the error persists on a specific project, the project files themselves might be corrupted. autodesk moldflow error 99998 best