Autodesk Moldflow Error 99998 Exclusive [WORKING]

Real-time file scanning by tools like McAfee, Symantec, or Windows Defender can temporarily lock a .mfp or .sdy file for inspection. Moldflow sees this as an exclusive lock held by another process (the antivirus), and Error 99998 appears.

The "Exclusive" error does not mess around. Unlike other errors that offer a helpful suggestion (e.g., "Mesh has overlapping elements"), Error 99998 is a gatekeeper. It usually manifests at the very beginning of an analysis, often during the "Initialization" or "Input deck processing" phase.

The error message is blunt:

Error 99998: The file is locked exclusive by another process.

In layman’s terms, Moldflow is trying to read a file (usually the .stud or results file), but something else has grabbed it and refuses to let go. It is the software equivalent of walking into your own house and finding the door bolted shut from the inside.

Add the following folders to your antivirus exclusion list: autodesk moldflow error 99998 exclusive

After adding exclusions, restart the antivirus service or reboot.

You might see this error in several forms:

Regardless of the phrasing, the core issue is contention—something is fighting Moldflow for resources it needs exclusively.

Autodesk Moldflow Error 99998 typically indicates that the required solver license (e.g., AMI_STANDARD, AMI_PREMIUM, or AMI_ULTIMATE) is not available or all licenses are currently in use.

If your specific error message includes "exclusive," it generally means a background process is holding a lock on the license or a previous analysis didn't close properly, preventing a new one from starting. Recommended Troubleshooting Steps Check for "Rogue" Processes Real-time file scanning by tools like McAfee, Symantec,

: Sometimes a previous analysis hangs and keeps the license occupied. Task Manager and look for processes like

End these tasks to release the "exclusive" hold on the license. Verify License Configuration

: Ensure your software is pointing to the correct license server and level. Windows Start Autodesk Moldflow Insight 202x License Configuration Confirm the License Level

(Standard, Premium, or Ultimate) matches your actual subscription. Ensure the Server Hostname is correct. Update the Licensing Service

: Outdated licensing components often cause communication timeouts. Uninstall and reinstall the Autodesk Desktop Licensing Service (ADLS) to ensure it’s the latest version. Increase Timeout Limits Error 99998: The file is locked exclusive by another process

: If you are on a slow network or VPN, the request might time out before it can grab the license. System Environment Variable FLEXLM_TIMEOUT with a value of (10 million). Check License Server Status on your license server to perform a "Status Inquiry".

Confirm that the Insight solver licenses (MFIB, MFIP, or MFIA) are listed and not expired. Are you running this analysis on a local workstation network/Linux solver

12 Solutions to Fix AutoCAD License Manager Not Functioning - ZWSOFT

Moldflow needs to write lock files to:

If your Windows account lacks Full Control over these folders, Moldflow cannot create the necessary exclusive lock file, triggering the error.

Autodesk addressed many exclusive-lock issues in Moldflow 2024 and 2025. Upgrade to these versions to benefit from:

Never force-close Moldflow using Task Manager while a study is open. Always use File > Close Study and File > Exit.