Autodesk Moldflow Error 99998 Best May 2026
Based on the diagnosis, here are the verified solutions for Error 99998:
Situation: 3D fill simulation fails with error 99998 shortly after start. Action taken:
Result: Error resolved; overall simulation time reduced by improved mesh.
Before fixing it, you must understand the root cause. Through analyzing hundreds of support cases, these are the top 5 triggers: autodesk moldflow error 99998 best
If you want, I can draft a concise troubleshooting email or support ticket template including the specific logs and model details to send to Autodesk support.
Autodesk Moldflow Error 99998 typically indicates that the software cannot find a valid license to run the simulation solver. This happens even if the user interface (Synergy) is open, as the solver (Insight) requires its own separate license check when a job starts. Autodesk Community, Autodesk Forums, Autodesk Forum Quick Fixes for Error 99998 Run the License Configuration Tool : This is the most common fix for versions 2021 and newer. Navigate to C:\Program Files\Autodesk\Moldflow Synergy 202X\bin\mlc.exe License Configuration in your Windows Start Menu. Verify the License Mode (Network), License Level (Standard, Premium, or Ultimate), and Server Name are all correct. Check License Availability
utility on your license server to perform a "Status Inquiry". Confirm that the Insight solver licenses (e.g., ) are listed and not fully in use by other team members. Restart the Simulation Compute Manager (SCM) Based on the diagnosis, here are the verified
: If the SCM cannot communicate with the licensing service, the job will fail immediately. Restart the Autodesk Simulation Compute Manager service in the Windows Services manager. Clear Rogue Processes
: Sometimes a previous crash leaves "ghost" solver tasks running (like
), which continue to hold a license. Use Task Manager to end these processes and free up the license seat. Why This Happens Missing Product Keys Result: Error resolved; overall simulation time reduced by
: Insight and Synergy require separate product keys during installation; if the solver was installed with the wrong key, it won't pull a license. Firewall/VPN Interference
: Security software or a VPN may block the communication between your workstation and the license server. Expired Maintenance
: If your subscription has lapsed, the server will no longer issue valid tokens for the solver.
For detailed troubleshooting on specific operating systems, refer to the Autodesk Support Article for Windows Linux Guide diagnosing your license server logs to see if specific users are hogging all the seats?
Provide logs, a small reproducible model, exact Moldflow version, and the solver output when contacting support.