If none of the above works, collect these files and open a support ticket:
Autodesk may identify a rare bug requiring a hotfix or a specific solver version patch.
Final Note: Error 99998 is almost never a “true” disk space issue on modern systems (unless your drive is actually full). Focus on data integrity, mesh quality, and file path hygiene first.
Comprehensive Technical Analysis: Autodesk Moldflow Error 99998
Error 99998 is a critical licensing failure in Autodesk Moldflow Insight and Adviser that occurs when the software cannot verify or check out the required solver license to initiate an analysis. This error typically manifests in the analysis log as: "Required license for AMI_STANDARD, AMI_PREMIUM or AMI_ULTIMATE is not available, or all licenses are currently in use". Root Causes of Error 99998
The occurrence of Error 99998 can be attributed to several architectural and environmental factors within the Autodesk licensing ecosystem:
License Availability & Expiration: The license may have expired, or the specific solver seat (e.g., MFIB, MFIP, or MFIA) is missing from the license file.
Concurrency Limits: All available license seats are currently occupied by other users or active parallel solve jobs. Configuration Mismatches:
Incorrect license level selection (e.g., attempting an "Ultimate" analysis on a "Premium" license).
The software is pointing to an incorrect server name or IP address. Systemic Failures: Outdated Network License Manager (LMTools) versions.
Lack of communication between the client and the Simulation Compute Manager (SCM). Firewalls or anti-virus software blocking license requests.
Platform-Specific Issues: On Linux, common causes include missing license configuration packages or incorrect environment variables like ADSK_SERVICE_ADDRESS. Diagnostic Procedures
To identify the exact nature of the failure, administrators should follow a structured diagnostic workflow:
Server Status Inquiry: Use LMTools on the license server, navigate to the Server Status tab, and click Perform Status Inquiry. Verify that the Insight solver licenses are listed and not expired.
Rogue Process Check: On the local machine, check the Task Manager for "rogue" solver tasks such as flow.exe, cool.exe, or warp.exe. These can sometimes hang and continue to hold a license seat.
Communication Logs: Check the license service log file for checkout errors or "denied" messages, which indicate whether the request is reaching the server but being rejected. Resolutions and Best Practices For Windows Users
Run License Configuration: Access the License Configuration tool (mlc.exe) via the Windows Start Menu under the Moldflow Insight folder. Ensure the License Mode, Level, and Server information are correct. autodesk moldflow error 99998 exclusive
Reinstall License Configuration: If configurations persist in failing, uninstall the "Autodesk Moldflow Insight License Configuration" from the Control Panel and reinstall it using the original installer.
Timeout Variables: If the server takes too long to respond, create a FLEXLM_TIMEOUT environment variable to increase the wait time. For Linux Users
YourProject\Study_001\ for any .lck files.Note: On some network systems, lock files are stored in a central
\Locksdirectory. Consult your IT admin.
If using a network license:
For VPN users: Ensure your VPN allows bidirectional TCP traffic on the license port (usually 2080, 27000-27009). Add the license server IP to the exclusion list of your VPN’s split tunneling.
Do not confuse Error 99998 with a standard permission error (Error 5).
If you see 99998, do not change folder security settings. You need to find what is holding the lock, not grant more access.
Error 99998 "Exclusive" is rarely a Moldflow bug; it is a Windows resource management problem dressed up in solver clothing. By understanding that Moldflow simply needs undisturbed ownership of its files, you can usually fix this in under two minutes.
Have you encountered a unique cause for Error 99998? Share your experience in the comments below. If you are still stuck, attach your job.log file—the clue is always in the line just before the failure.
Disclaimer: This post is based on community troubleshooting and Autodesk Knowledge Network archives. Always backup your study files before attempting advanced fixes.
Check Active Licenses: Use the LMTools Utility on your server machine. Navigate to the Server Status tab and click Perform Status Inquiry to see if licenses like MFIB, MFIP, or MFIA are listed and available.
End "Rogue" Processes: Check Windows Task Manager for hung solver tasks such as flow.exe, cool.exe, warp.exe, or mhb3d.exe. Ending these processes can release "stuck" licenses.
Update License Configuration: Open the Moldflow License Configuration tool (search for "License Configuration" in the Windows Start menu or run mlc.exe from the product's bin folder) to verify the license level and server name are correct. Common Causes & Solutions
Incorrect License Server: The software may be pointing to the wrong machine. Update the server address in the License Configuration tool or edit the LICPATH.LIC file located in C:\ProgramData\Autodesk\CLM\LGS\.
Blocked Communication: Ensure that your firewall or antivirus is not blocking the license request. For Named User (Sign-in) licensing, the computer must have unrestricted access to api.autodesk.com on port 443.
License Level Mismatch: If you are using a batch script (like runstudy), ensure you are calling the correct solver level (e.g., Ultimate vs. Standard) that matches your entitlement. If none of the above works, collect these
Expired Subscription: Verify in your Autodesk Account that your Moldflow Insight subscription has not expired. Advanced Troubleshooting
ERROR 99998 when running batch from Command Shell (runstudy)
Moldflow Insight Ultimate – ERROR 99998 when running batch from Command Shell (runstudy) ... I'm using Moldflow Insight Ultimate ( Autodesk Community, Autodesk Forums, Autodesk Forum
In Autodesk Moldflow, Error 99998 typically indicates a license failure where the required "feature" (the specific product level or solver) cannot be found or accessed by the software.
Common features that trigger this error if they are missing or misconfigured in your license file include: AMI_STANDARD (Moldflow Insight Standard) AMI_PREMIUM (Moldflow Insight Premium) AMI_ULTIMATE (Moldflow Insight Ultimate) AMA_ULTIMATE (Moldflow Adviser Ultimate) Common Causes & Solutions Expired or Missing License on your license server, go to the Server Status tab, and click Perform Status Inquiry . Look for features like to ensure they are active and not expired. Mismatched License Levels
: If you installed the Ultimate update but only have a Premium license, the software will fail. Ensure your License Configuration
(found in the Windows Start menu under Autodesk Moldflow) is set to the correct license level. All Licenses in Use : Check if "rogue" solver tasks ( ) are running in your Task Manager . Ending these processes can release stuck licenses. Incorrect Product Key
: For older versions (2019 and below), ensuring the correct product key was used during installation is critical, as Synergy (the UI) and Insight (the solver) require different keys.
For more detailed troubleshooting, you can check the official Autodesk Support Page for Error 99998 Are you seeing a specific feature name
(like AMI_ULTIMATE) in your error log, or would you like help checking your license server status
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
: 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 Autodesk may identify a rare bug requiring a
: 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
: 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
Error 99998 in Autodesk Moldflow Insight generally indicates that the solver (Insight) is unable to obtain a required license to run the analysis. While "exclusive" specifically often refers to an environment where a license cannot be shared or is blocked by an existing process, the 99998 error usually stems from configuration gaps between the user interface (Synergy) and the solver (Insight). Quick Troubleshooting Checklist
Verify Insight Installation: Ensure that both Moldflow Synergy (the UI) and Moldflow Insight (the solver) are installed. They often require separate product keys. Check License Manager (LMTools): Open LMTools and perform a Status Inquiry.
Confirm that the Insight solver features (e.g., MFIB, MFIP, or MFIA) are listed and not expired.
Kill "Rogue" Processes: If a previous analysis crashed, a background process might still be "exclusively" holding the license. Open Task Manager and end any instances of flow.exe, cool.exe, warp.exe, or mhb3d.exe. Common Causes & Solutions Detailed Solution Incomplete Configuration
Use the License Configuration Tool (found in the Windows Start Menu under Autodesk Moldflow Insight) to re-select your license level (Standard, Premium, or Ultimate) and point it to the correct server. Server Mismatch
In some versions, Synergy and Insight may accidentally point to different servers. Use the AdskLicensingInstHelper command-line tool to manually set the Insight server. License Exhaustion
If you are running complex analyses like Design of Experiments (DOE), you may have reached your license limit for concurrent child jobs. Try reducing the number of parallel jobs in the Simulation Compute Manager. Firewall Blocks
Ensure that the required ports for the Autodesk Network License Manager (typically 2080 and 27000-27009) are open. Advanced Fix: Resetting the Licensing Service
If standard configuration fails, you may need to reset the registration for the Autodesk Licensing Service: Open the Command Prompt as Administrator.
Navigate to the licensing helper directory (usually C:\Program Files (x86)\Common Files\Autodesk Shared\AdskLicensing\Current\helper\).
Run the unregister command for Moldflow Insight and then re-register it using the correct product key and server information.
Are you running this analysis on a local workstation or a remote Linux cluster?
If you are using a network license (common in enterprise environments), latency between your machine and the license server can cause this error. Moldflow requests an exclusive lock. If the server takes longer than 2-3 seconds to respond (due to network congestion, VPN issues, or server overload), the client interprets this as a denial and raises error 99998.
Over time, the project database (project.mfj) can become corrupted. Moleflow interprets corruption as an inconsistent lock state, raising Error 99998 even when no lock exists.