Error 99998 in Autodesk Moldflow is a critical licensing issue that occurs when the software cannot verify the required license for your simulation
. It essentially means the solver has started but cannot "checkout" a license to run the actual math behind the study. Common Causes & Solutions License Not Available:
All available licenses are currently being used by other team members. LMTools Utility on your license server. Go to the Server Status tab and click Perform Status Inquiry to see how many licenses are in use. Incorrect License Configuration: This is common in versions 2023 or newer
, where the license level (Standard, Premium, Ultimate) hasn't been set correctly. Moldflow License Configuration
tool (found in the Windows Start Menu under Autodesk Moldflow Insight/Adviser 202x) and ensure the License Level License Type Server Name are all correct. "Rogue" Processes:
Sometimes a previous simulation crashes but stays in your computer's memory, holding onto a license. Task Manager and look for processes like . Select them and click Service Communication (SCM): Simulation Compute Manager (SCM) might be having trouble talking to the license server. Ensure the Autodesk Simulation Compute Manager service is running in your Windows Services (services.msc). Specific Scenarios
Error 99998 in Autodesk Moldflow (Synergy, Insight, or Adviser) is a high-level licensing error indicating that the software cannot obtain a required license autodesk moldflow error 99998 exclusive
to run a simulation. While the error message often mentions a specific license tier—such as AMI_STANDARD AMI_PREMIUM AMI_ULTIMATE
—the underlying issue is usually a failure in communication between the Moldflow solver and the license server. Primary Causes Missing License File Components
: The license file might contain a license for Synergy (the user interface) but lacks the required entry for Insight (the solver). Incorrect Product Key
: Entering the wrong product key during installation can cause this error, as Synergy and Insight require distinct keys that change with every version. License Configuration Errors
: The software might not be pointing to the correct license server or port, or the license level (Standard vs. Ultimate) might be misconfigured. Server Communication Issues
: Firewalls, anti-virus software, or VPN restrictions can block the license request from reaching the server. Recommended Troubleshooting Steps Verify Server Status with LMTools on the license server. Navigate to the Server Status tab and click Perform Status Inquiry Confirm that the solver licenses (e.g., ) are listed and not expired. Update License Configuration (Windows) Error 99998 in Autodesk Moldflow is a critical
Start Menu > Autodesk Moldflow Insight/Adviser 202x > License Configuration 202x Ensure the License Mode Server Hostname are correct. and restart the software. Check Environment Variables Ensure the ADSKFLEX_LICENSE_FILE variable is set correctly in Windows. If the server is on a slow network, consider creating a FLEXLM_TIMEOUT variable to prevent the license request from timing out. Reinstall Licensing Components
If the issue persists in Moldflow 2021 or newer, try uninstalling and then reinstalling the Autodesk Moldflow Insight License Configuration package from the Windows Control Panel. For further assistance, you can consult the official Autodesk Support Technical Article on Error 99998. solver installation instead?
What makes Error 99998 so frustrating—and frankly, so "interesting" from a software architecture perspective—is the variety of culprits. It is rarely a physics problem; it is almost always a systems administration problem disguised as an engineering failure.
1. The "Ghost Process" (The Usual Suspect)
The most common cause is a previous analysis that didn't clean up after itself. You ran a study yesterday, it crashed, you closed the window, but a background process (mpi.exe or runstudy.exe) is still lurking in the shadows of your Windows Task Manager. It is holding a "lock" on the results file. When you try to run a new study, the Synergy solver sees that lock and panics, throwing the 99998.
2. The Network Lag (The Invisible Hand) In corporate environments where studies are saved on network drives (NAS/SAN), latency can be a killer. If the license manager or the file write-handshake takes a millisecond too long, the solver tries to write to a file it hasn't fully "claimed" yet. The system interprets this as an "Exclusive" violation.
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Before you submit a support ticket to Autodesk, run this 60-second drill:
%temp% purged)Error 99998 in Autodesk Moldflow (Insight or Synergy) is a critical pre-processing error that halts the analysis before it begins. The standard error message reads:
"Error 99998 – Failed to create the required solver input files. Check disk space and write permissions."
While the message points to disk space or permissions, the root cause is often more complex. Below is an exclusive breakdown of why this error occurs and how to resolve it systematically.
Modern endpoint protection software (McAfee, Symantec, CrowdStrike, or even Windows Defender) can quarantine or delay the license handshake. Because Moldflow’s license check involves writing a .tmp lock file in a system directory, aggressive real-time scanning can flag this as suspicious behavior, terminating the license acquisition and returning error 99998.