Error 99998 in Autodesk Moldflow (Insight or Adviser) typically indicates a license communication failure between the software and the server. It often occurs when the solver cannot find a valid license for your specific version or the server is unreachable. Quick Fix Guide
Run the License Configuration UtilityThe most common cause is a missing or incorrect license level selection.
Windows: Go to the Start Menu > Autodesk Moldflow Insight 202X > License Configuration 202X (or run mlc.exe from the program files bin folder).
Verify Settings: Ensure the License Mode (e.g., Network License) and License Level (Standard, Premium, or Ultimate) match your actual subscription.
Server Name: Re-enter the hostname or IP of your license server. If using a custom port, use the format port@servername. Click Apply and then OK before restarting Moldflow.
Increase License TimeoutIf your network is slow, the solver may give up before the license server responds. Open Environment Variables on your machine. Create a new System Variable named FLEXLM_TIMEOUT.
Set its value to 10000000 (10 million) and restart your computer.
Check Firewall and PortsThe firewall may be blocking the solver from communicating with the server. Ensure the following TCP ports are open: 2023: 44100, 44200 2021: 43100, 43200 Older versions (2017-2019): 43911, 42911, 43921
Update Simulation Compute Manager (SCM)For versions 2021 and newer, SCM handles job distribution. If it is corrupted or misconfigured, it can trigger Error 99998. Check if SCM is installed and the service is running.
If you recently updated Moldflow, ensure both Synergy (UI) and Insight (Solver) were updated to the exact same version.
Release Stuck LicensesIf the error says "all licenses are in use" but they shouldn't be, there may be "rogue" processes hanging.
Open Task Manager and end any instances of flow.exe, cool.exe, warp.exe, or mhb3d.exe.
For deeper troubleshooting, such as replacing server names with IP addresses in the registry, refer to the official Autodesk Error 99998 Guide.
Autodesk Moldflow Error 99998 is a licensing error indicating that the Insight solver cannot find or access the required license to run an analysis. This most often happens because the solver (Insight) and the user interface (Synergy) use separate licenses, and the solver has not been correctly pointed to the license server. Primary Causes
Missing Solver License: Your license file might only include seats for Synergy (UI) but not the Insight solver (MFIB, MFIP, or MFIA).
Incorrect License Configuration: The solver is not configured with the correct license server name or IP address.
License Level Mismatch: You may have installed an update for a different license level (e.g., Premium vs. Ultimate) than what you actually own.
Network/Firewall Blocks: A firewall or VPN might be preventing the solver from communicating with the license server.
Request Timeouts: The solver stops waiting for a license response before one is received. Core Troubleshooting Steps
Autodesk Moldflow Error 99998 typically indicates that the Insight solver license is unavailable , expired, or incorrectly configured
. 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 autodesk moldflow error 99998 best
for different Moldflow versions to verify your installation?
While running a high-stakes simulation in Autodesk Moldflow, encountering the cryptic "Error 99998" can be a major roadblock. This error is a generic "unexpected termination" signal, meaning the solver crashed before completing the analysis. Because it acts as a catch-all for various internal failures, finding the "best" fix requires a systematic approach to troubleshooting.
Here is the definitive guide to resolving Autodesk Moldflow Error 99998 and getting your studies back on track. Check Local System Resources
The most common cause for an unexpected solver crash is a lack of hardware resources. If the solver cannot access the memory or disk space it needs, it will shut down abruptly.
Free Up Disk Space: Moldflow generates massive temporary files during calculation. Ensure your "Temporary Directory" (defined in Simulation Job Manager or Synergy preferences) has at least 50GB to 100GB of free space.
Monitor RAM Usage: For complex parts with high element counts, you may be exceeding your physical RAM. Close unnecessary background applications or increase your system's virtual memory (page file).
Clear Temporary Files: Navigate to your temporary folder and delete old .trm, .msh, and .res files from previous failed runs to prevent file path conflicts. Audit Your Mesh Quality
A "bad" mesh is the leading technical cause of Error 99998. If the solver encounters an element with zero volume or extreme distortion, the mathematical matrix becomes unsolvable.
Scan for Overlaps: Use the Mesh Repair Wizard to find and fix overlapping elements or intersections.
Fix Aspect Ratios: High aspect ratio elements (above 50:1 for Dual Domain or 100:1 for 3D) can cause the solver to "diverge" and crash. Aim for an average aspect ratio below 3:1.
Check for Connectivity: Ensure there are no disconnected nodes or "islands" in your mesh. A "Connectivity Diagnostic" should show a single continuous body. Reset the Simulation Job Manager (SJM)
Often, Error 99998 isn't a problem with your model, but a glitch in the communication between Synergy (the UI) and the Solver.
Restart Services: Open the Windows Task Manager, find the "Simulation Job Manager" service, and restart it.
Check Firewall Settings: Ensure that flow.exe, cool.exe, and warp.exe have full permissions to communicate through your firewall. Even local simulations use "internal" network ports that can be blocked by overly aggressive security software.
Update the SJM: Autodesk frequently releases patches for the Job Manager. Ensure you are running the latest version available via the Autodesk Desktop App or Account Portal. Simplify Analysis Settings
If the error persists, the solver may be struggling with a specific physical calculation. Try simplifying your parameters to isolate the cause:
Toggle Inertia/Gravity: If you have "Inertia effects" or "Gravity" turned on in the Solver Statistics, try turning them off.
Material Data: Check if your material UDB file is corrupted. Try running the simulation with a "generic" material from the Moldflow library; if it works, the issue lies in your custom material data.
Time Steps: If you are using manual time steps for a transient cool or warp analysis, try switching back to "Automatic" to see if the solver can find a stable path. The "Clean Slate" Method
If none of the above works, the study file itself might be corrupted. Export your mesh as a .udm or .pat file. Create a brand-new Moldflow project. Import the mesh into a fresh study. Re-apply your injection points and process settings. Launch the analysis.
By stripping away the metadata associated with the old project, you often bypass the specific internal conflict triggering the 99998 error.
If you can share a few more details, I can provide a more tailored solution:
The exact point it crashes (e.g., 5% into Filling, during Cooling)? The Analysis Technology you're using (Dual Domain vs. 3D)?
Any specific warnings in the Analysis Log right before the error?
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
: Sometimes a previous crash leaves "ghost" solver tasks running (like Error 99998 in Autodesk Moldflow (Insight or Adviser)
), 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?
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 is a generic "unexpected failure" message that typically indicates the solver has crashed due to memory limitations, licensing interruptions, or problematic geometry. Because it is a catch-all error, the "best" way to fix it involves a systematic process of elimination.
Follow these steps to resolve Error 99998 and get your simulation back on track. 1. Check System Resources and Memory
The most common culprit is a lack of available RAM or disk space during the calculation phase.
Clear Temp Files: Delete files in your %TEMP% folder to ensure the solver has enough "scratch" space.
Monitor RAM: Check Task Manager. If memory usage hits 90%+, the solver may trigger a 99998 crash.
Virtual Memory: Increase your Windows Paging File size to at least 2x your physical RAM. 2. Verify Licensing and Connectivity
If the solver loses its connection to the license server for even a second, it will abort with this code.
Stability: Ensure you have a stable VPN or LAN connection if using a network license.
Service Restart: Restart the "Autodesk Simulation Job Manager" or "ADSKLicensing" service via services.msc. Connectivity Failures: The most common culprit
Firewall: Confirm that ports 20030 and 2080 are open for communication between the workstation and the server. 3. Inspect Geometry and Mesh Quality
A "bad" mesh can cause the solver equations to diverge, leading to an immediate crash.
Repair Tools: Run the "Mesh Repair Wizard" to find overlapping elements or zero-area faces.
Simplify Model: Remove tiny fillets, logos, or cosmetic textures that create hyper-dense mesh clusters.
Node Density: If the error occurs during the "Filling" stage, try slightly increasing the global edge length to see if a coarser mesh bypasses the crash. 4. Update Software and Drivers
Outdated components can lead to instability with newer Moldflow solvers.
Job Manager: Ensure the Autodesk Simulation Job Manager (SJM) is updated to the latest version.
GPU Drivers: Update your graphics card drivers, as Moldflow utilizes the GPU for certain visual processing and calculation tasks.
Service Packs: Check the Autodesk Desktop App for any pending hotfixes for your specific Moldflow version. 5. Advanced Troubleshooting (The "Clean Slate" Method)
If the error persists on a specific project, the project files themselves might be corrupted.
Export as .udm: Export your study as a Universal Descriptive Model (.udm). New Project: Create a brand-new project folder.
Import: Re-import the .udm file. This often strips away hidden corruption in the original project database.
☑ Key Takeaway: Start with RAM/Disk space first, then move to Licensing, and finally Mesh Repair. To help you find the exact fix, could you tell me: At what percentage does the simulation fail?
Are you running the simulation locally or on a cloud/remote server? Did this model mesh successfully before you hit solve?
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
In 70-80% of cases, the root cause lies in the finite element mesh. The solver relies on the mathematical assumption of a "continuous domain." If the mesh is disjointed, the solver attempts to calculate flow between nodes that are not topologically connected, leading to an index out of bounds or a null pointer reference.
To avoid Error 99998 recurring:
A critique of handling this error would be incomplete without mentioning Autodesk Support.
| Cause Category | Specific Trigger | Diagnostic Step | |----------------|----------------|------------------| | Project corruption | Saving over network or interrupted save | Check if other studies in same project run. | | Insufficient disk space | Scratch/temp drive full during solver write | Verify free space > 2× study size. | | Mesh mismatch | 3D mesh used with Midplane-only process (e.g., ICM) | Review mesh type vs. analysis sequence. | | Material data error | Missing viscosity or PVT data for current temperature range | Validate material in database. | | Antivirus interference | Real-time scan blocking solver temp files | Temporarily disable AV for Moldflow folders. |
adskflex -borrow resetTo avoid Error 99998 in future projects, adopt the following workflow habits: