Autodesk Moldflow Error 99998 typically means that the required license for the solver (Insight) or Adviser is unavailable, expired, or currently maxed out by other users.
Here is how to troubleshoot and resolve it based on common causes: 1. Check License Availability & Status
The most common cause is simply that all available seats are in use or the license has expired.
Use LMTools: Open the Autodesk License Manager (LMTools) on your server. Go to the Server Status tab and click Perform Status Inquiry. Check for codes like MFIB, MFIP, or MFIA to see if seats are available.
Kill Rogue Processes: If licenses appear stuck, open Task Manager and end any lingering solver processes like flow.exe, cool.exe, or warp.exe. 2. Verify License Configuration
If seats are available but the error persists, the software might be looking in the wrong place.
Run MLC Utility: On Windows, go to the Start Menu > Autodesk Moldflow Insight/Adviser > License Configuration. Ensure the "License Mode" (Network/Named User) and "License Levels" (Standard, Premium, or Ultimate) match your actual subscription.
Check the Server Name: In the same utility, verify the server name or IP address is correct. Use the format port@servername (e.g., 27000@yourserver) if a custom port is required. 3. Connection & Network Issues
Sometimes a firewall or a slow network prevents the "handshake" between your computer and the license server.
Open Firewall Ports: Ensure ports like 2080 and 27000-27009 are open. Different versions may require specific ports, such as 44100 and 44200 for Moldflow 2023.
Increase Timeout: If you're on a slow connection (like a VPN), the request might be timing out. Create a system environment variable named FLEXLM_TIMEOUT and set its value to 10000000 (10 million). 4. Linux-Specific Fixes If you are running solvers on a Linux machine:
Install Configuration Package: Ensure the Insight Licensing Configuration package is installed on the Linux system.
Check Service Address: Verify that the ADSK_SERVICE_ADDRESS variable in your ami20XX or mfclient.env file points to the correct licensing service.
Are you running a specific version of Moldflow (e.g., 2024, 2025) or using a specialized licensing setup like Token Flex?
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)
: 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 autodesk moldflow error 99998 best
: 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
: 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?
The Autodesk Moldflow Error 99998 typically occurs when the software cannot find or check out a required license for the solver (Insight) or the UI (Synergy). This can happen if the license configuration is incomplete, the license server is unreachable, or the license has simply expired. Primary Fixes for Windows
Run License Configuration: This is the most common fix for versions 2021 and newer. Close all instances of Moldflow.
In the Windows Start Menu, go to the Moldflow Insight 202X folder and select License Configuration 202X.
Verify the Network License is selected, set the correct license level (Standard, Premium, or Ultimate), and ensure the License Server hostname is correct. Click Apply and then OK.
Check LMTools Server Status: Use LMTools on the license server to confirm the Insight solver license (MFIB, MFIP, or MFIA) is active and not expired.
Clear Stuck Solver Tasks: Sometimes a "rogue" task remains in the background, holding a license. Open Task Manager and end any processes named flow.exe, cool.exe, warp.exe, or mhb3d.exe.
Increase License Timeout: If the connection to the server is slow, add a system environment variable named FLEXLM_TIMEOUT with a value of 10000000 (10 million) to give the server more time to respond. Fixes for Linux Installations
Install License Configuration Package: For Linux, the Insight solver requires a separate license configuration package (included in the download files) to be installed.
Update ADSK_SERVICE_ADDRESS: Ensure the environment variable ADSK_SERVICE_ADDRESS points to the correct hostname and port (usually in host:port format) in the mfclient.env (thin client) or /etc/opt/Autodesk/ami20XX (workstation) file. Other Common Causes
Autodesk Moldflow Error 99998 typically indicates that the Insight solver license is unavailable , expired, or incorrectly configured Autodesk Moldflow Error 99998 typically means that the
. This is distinct from the Synergy (UI) license, and both must be correctly active to run an analysis Autodesk Community, Autodesk Forums, Autodesk Forum Top Solutions for Error 99998 Verify License Availability License Manager Tool (LMTools) on your server to perform a "Status Inquiry"
. Confirm that the Insight solver (MFIB, MFIP, or MFIA) is listed and not expired Run License Configuration
: Many 2023 and newer version errors occur because the local License Configuration utility has not been set up License Configuration 202x tool from the Windows Start menu Network License Set Insight to the correct level ( Standard, Premium, or Ultimate ) and enter the correct server hostname Check Product Keys
: Ensure the correct product key was used during installation
. Synergy and Insight require separate, version-specific product keys (e.g., the 2017 key will not work for 2018) Autodesk Community, Autodesk Forums, Autodesk Forum Clear "Rogue" Tasks
: Sometimes a license remains "stuck" to a crashed process. Open Task Manager and end any lingering solver tasks like to release the license Common Causes to Investigate Server Connectivity
: The client machine cannot find the license server on the network or is blocked by a firewall/antivirus License Level Mismatch
: The analysis requires a higher license level (e.g., Ultimate) than what is currently configured Concurrent Use
: All available licenses are currently in use by other machines Environment Variables (Linux) : On Linux systems, ensure the ADSK_SERVICE_ADDRESS is correctly set in the mfclient.env specific product keys
for different Moldflow versions to verify your installation?
Moldflow is a memory-intensive application. Error 99998 often appears when the solver requests memory that the system cannot allocate or access.
Situation: 3D fill simulation fails with error 99998 shortly after start. Action taken:
Result: Error resolved; overall simulation time reduced by improved mesh.
Would you like a checklist in PDF format, or help diagnosing your specific Moldflow version?
Understanding and Resolving Autodesk Moldflow Error 99998 Error 99998
is a critical licensing error in Autodesk Moldflow that occurs when the solver (Insight) fails to check out a valid license for the analysis. It is typically accompanied by a message stating that the required license for AMI_STANDARD AMI_PREMIUM AMI_ULTIMATE is unavailable or that all licenses are currently in use. Common Causes of Error 99998 RAM Exhaustion: If the model size exceeds available
The error essentially means the communication link between the Moldflow solver and the license server is broken or the server is denying the request. Key causes include: License Exhaustion/Expiration:
All available license seats are in use by other users, or the current subscription has expired. Configuration Mismatch:
The Insight solver is not configured to look at the correct license server or is set to the wrong license level (e.g., set to Standard when only an Ultimate license is available). Incorrect Product Keys:
Synergy (the user interface) and Insight (the solver) require separate installations and product keys. Using the wrong key during setup often triggers this error. Network Barriers:
Firewall restrictions, incorrect port settings (default is often 27000), or significant clock differences between the client and server can block communication. Linux-Specific Issues:
On Linux systems, the "Insight Licensing configuration package" may be missing or the ADSK_SERVICE_ADDRESS variable in the mfclient.env file may be incorrectly defined. Autodesk Community, Autodesk Forums, Autodesk Forum Effective Solutions
To resolve Error 99998, follow these steps based on your operating system: For Windows Users Run the License Configuration Tool: Open the Windows Start menu and navigate to Autodesk Moldflow Insight 202x > License Configuration 202x
. Ensure the license level (Standard, Premium, or Ultimate) matches your actual entitlement and that the server hostname is correct. Verify Server Communication:
Ensure you can "ping" the license server. If using a non-standard port, use the format port@servername in the configuration tool. Check Service Status: Verify that the Autodesk Network License Manager
is running and that the license file actually includes the "Insight" feature increment. For Linux Users Install Config Package: Ensure the autodesk-moldflow-insight-license-configuration package is installed and running as a service. Manual Variable Setup: /etc/opt/Autodesk/ami-20XX mfclient.env file. Set the ADSK_SERVICE_ADDRESS variable to your license server's IP and port (e.g., 127.0.0.1:27000 Best Practices for Prevention Regular Updates: Autodesk Desktop App
to ensure both Synergy and Insight are on the same update version, as version mismatches can cause solver-side licensing failures. Monitoring Usage:
Use tools like LMTOOLS to monitor license usage and avoid "All licenses in use" scenarios during peak simulation times. verifying license increments
within your license file to ensure Insight is correctly included? Solved: ** ERROR 99998 ** - Autodesk Community
Corrupt database files are a silent killer.
.nas or .out).Scenario: An automotive lens supplier received Error 99998 every time at 85% fill. Attempted fixes (failed): Re-mesh, change material, increase RAM. Best fix that worked:
Mesh > Mesh Diagnostics > Intersection > Display to locate the exact node.Mesh > Mesh Tools > Move Node, they shifted the node by 0.02 mm.Lesson: Error 99998 is often a localized geometric singularity, not a global solver failure.
If the diagnostic test showed the error lies in the geometry:
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