Moldflow generates massive temporary files (scratch files) during calculations. If the drive is full or the temporary folder is cluttered, the solver fails. Navigate to your project's temporary storage folder. Close Moldflow entirely. Delete all files in the %TEMP% directory.
Autodesk Moldflow is the industry standard for plastic injection molding simulation, but even the most robust software can hit a wall. One of the most frustrating hurdles for simulation engineers is the cryptic Error 99998. When your analysis terminates abruptly with this message, it often indicates a fundamental breakdown in the communication between the solver and your hardware or a critical failure in the mesh. What is Autodesk Moldflow Error 99998?
The model is too large for the available system memory. autodesk moldflow error 99998 full
Moldflow solvers, especially the 3D solver, are extremely memory-intensive.
Error 99998 is a generic "Internal Solver Error." Unlike specific error codes that point directly to a missing material property or a disconnected gate, 99998 is a catch-all signal that the solver has crashed or been forced to stop by the operating system. It essentially means the simulation engine encountered a condition it didn't know how to handle. Common Root Causes Close Moldflow entirely
Run the "Mesh Repair Wizard" to eliminate overlaps, intersections, and free edges.
Anti-virus software or lack of administrative rights blocking the temporary scratch files. Step-by-Step Troubleshooting Solutions 1. Check Your Hardware Resources One of the most frustrating hurdles for simulation
Ensure your Windows Paging File is set to "System Managed" or manually increased to at least 2x your physical RAM. 2. Clean the Temporary Directory
A "dirty" mesh is a leading cause of internal solver crashes.