Error 99998 __link__ | Autodesk Moldflow

Troubleshooting Autodesk Moldflow Error 99998 — Causes and Fixes

Autodesk Moldflow Error 99998 is a common but vague runtime error that can interrupt simulation workflows and frustrate engineers. This post explains likely causes, step-by-step troubleshooting, and practical fixes to get your simulations running again.

When to Contact Support

Provide:

  • Model file or a reduced test case reproducing 99998
  • Solver log and mesh quality report
  • Software version/build and OS
  • Steps already attempted (mesh fixes, boundary checks, solver tweaks)

This speeds diagnosis and helps engineers pinpoint whether the error is a model/setup issue or a software bug.

Troubleshooting Report: Autodesk Moldflow Error 99998 Error 99998 is a critical licensing error in Autodesk Moldflow that occurs when the solver cannot obtain a valid license to run an analysis. It typically indicates that the required license is either missing, currently in use by other users, or incorrectly configured. Core Causes

License Exhaustion: All available seats for a specific license level (e.g., AMI_STANDARD, AMI_PREMIUM, or AMI_ULTIMATE) are currently checked out by other users.

Configuration Mismatch: The License Configuration tool is set to the wrong license type or is pointing to an incorrect license server.

Expired or Missing License: The license file on the server has expired or does not contain the specific feature code for the solver being used.

SCM Issues: Problems communicating with the Simulation Compute Manager (SCM), often seen in versions 2021 and newer.

Parallel Job Limits: Exceeding the configured limit for parallel solves allowed by your license type. Step-by-Step Solutions 1. Verify License Configuration (Windows)

The most common fix for versions 2023 and 2024 is re-running the configuration utility: Close all instances of Moldflow Synergy.

Open the Windows Start Menu and find the Autodesk Moldflow Insight 202x folder. autodesk moldflow error 99998

Launch License Configuration 202x (alternatively located at C:\Program Files\Autodesk\Moldflow Synergy 202x\bin\mlc.exe). Ensure Network License is selected.

Set the Insight level to match your actual entitlement (Standard, Premium, or Ultimate). Enter the correct License server hostname and click Apply. 2. Check Server Status with LMTools

If configuration is correct, the issue may be on the server side: Open LMTools on the license server machine.

Go to the Server Status tab and click Perform Status Inquiry.

Check if the solver codes (MFIB, MFIP, or MFIA) are listed and if there are any "Total: 0" or "Expired" messages.

Verify if all licenses are currently checked out by other users. 3. Address Linux-Specific Environments

For solvers running on Linux, the environment variables must point correctly to the Autodesk Licensing Service:

Workstation Install: Edit /etc/opt/Autodesk/ami-20XX and ensure ADSK_SERVICE_ADDRESS is set to the correct host:port.

Thin Client Install: Edit the mfclient.env file in the installation folder to update the ADSK_SERVICE_ADDRESS.

Ensure the Autodesk Desktop Licensing Service is running using systemctl status adsklicensing. 4. Reinstall License Components If the license request isn't reaching the server at all: Troubleshooting Autodesk Moldflow Error 99998 — Causes and

Uninstall the Autodesk Moldflow Insight License Configuration from the Control Panel.

Reinstall it by running the original Moldflow Insight installer; it will detect the missing component and reinstall only the licensing portion. Summary Table: Error Variants Reported Error Likely Context AMI_STANDARD Standard solver license missing or busy. AMA_PREMIUM / ULTIMATE Moldflow Adviser license level mismatch. Warning 99997

Often precedes 99998; specifically refers to missing Fiber license.

Are you running Moldflow on a local workstation or a remote Linux cluster? Identifying this will help narrow down the exact configuration file to check.

Required license for fiber is not available..." or " Error 99998

Error 99998 in Autodesk Moldflow is a license-related error that occurs when the solver fails to obtain a valid license for Insight (AMI) Adviser (AMA)

. It typically indicates that the software cannot communicate with the license server, all available seats are in use, or the configuration is incorrect. Primary Causes Missing or Incorrect Configuration License Configuration Tool

has not been run or contains the wrong server name/IP address. License Exhaustion

: All purchased licenses are currently checked out by other users. Network/Firewall Blocks

: Communication between the workstation and the license server is blocked, or the server is down. Installation Conflicts Model file or a reduced test case reproducing

: Using an incorrect product key during installation, such as using a Synergy key for Insight, or having old beta versions installed. Server Timeout

: The license request times out before receiving a reply from the server. Troubleshooting Steps Run License Configuration Close all Moldflow instances. License Configuration

tool (found in the Windows Start menu under the Moldflow folder). Ensure the License Mode License Level (Standard, Premium, Ultimate), and Server Name are correct. Verify License Availability LMTools Utility to perform a "Status Inquiry". Check for active solver tasks (like

) in the Task Manager that may be "hanging" and holding onto a license. Adjust Environment Variables If you experience timeouts, create a system variable named FLEXLM_TIMEOUT with a value of (10 million) to allow more time for the license handshake. Verify the ADSKFLEX_LICENSE_FILE

variable in the Windows registry points to the correct server. Special Considerations for Linux Ensure the Autodesk Licensing Service (ALS) is running.

Verify that the Linux machine has unrestricted access to required URLs if using Named User licensing User Perspectives

Users often find that separate installations for the UI and solver can cause confusion.

“Assuming the license server has been configured correctly... this error is typically associated with an incorrect product key being entered when initially installing the software.” Solved: ** ERROR 99998 ** - Autodesk Community Autodesk Community, Autodesk Forums, Autodesk Forum · 7 years ago

“Moldflow simulations fails with Error 99998 - AMI_STANDARD license not available after timeout is reached.”

To address error 99998 or similar issues in Autodesk Moldflow, consider the following general troubleshooting steps:

Step-by-step troubleshooting

  1. Inspect geometry and CAD prep
  • Simplify geometry: remove tiny features, fillets, or holes that aren’t essential.
  • Fix zero-thickness or overlapping surfaces; use CAD repair tools or stitch faces.
  • Ensure part and mold bodies are properly closed and solid.
  1. Re-mesh with attention to quality
  • Use coarser mesh to test whether the error is mesh-related.
  • Check element quality metrics (aspect ratio, skewness); refine or remesh problem areas.
  • Avoid extremely small elements adjacent to large elements—smooth transitions help solver stability.
  1. Verify materials and units
  • Confirm every component has a material assigned and material data is complete (viscosity, PVT, thermal).
  • Ensure consistent units across geometry, materials, and process inputs.
  • For user-defined materials, validate input curves and interpolation ranges.
  1. Review boundary conditions and process settings
  • Check injection locations, runner/runnerless setups, vents, and pack/hold settings for correctness.
  • Reduce extremes: lower injection speed/pressure, increase melt/cool times, or relax convergence tolerances for testing.
  • Temporarily turn off advanced features (e.g., fiber orientation coupling) to isolate the cause.
  1. Run solver with diagnostic/logging enabled
  • Enable detailed logging if available and re-run to capture context around 99998.
  • Search logs for warnings prior to the error; these often point to the failing module (mesh, thermal, flow).
  1. Test on a simpler model
  • Create a minimal version (single cavity, simplified runner) and see if the solver completes.
  • If the simple model runs, incrementally add complexity until the error returns—this isolates the offending feature.
  1. Check installation, updates, and known issues
  • Verify Moldflow is up to date with the latest service packs or hotfixes.
  • Reinstall or repair the installation if files may be corrupted.
  • Search Autodesk support forums, knowledge base, and release notes for bug reports referencing 99998.
  1. Hardware and permissions
  • Confirm sufficient RAM and CPU for the chosen mesh and solver settings.
  • Run as administrator (Windows) or ensure file permissions aren’t blocking temp or result file creation.
  • If running on a cluster, ensure environment variables and solver licenses propagate correctly.
  1. Contact Autodesk support with diagnostics
  • If you can’t resolve it, collect: model file (or simplified failing case), solver logs, material files, system specs, and steps to reproduce.
  • Open a support ticket and attach the diagnostics; include any log excerpts showing messages before 99998.

Top 5 Causes of Moldflow Error 99998

Before attempting fixes, you must identify the source. Based on analysis from Autodesk forums and support tickets, these are the most common triggers:

Preventive practices

  • Clean and simplify CAD early in the workflow.
  • Standardize units and material templates across teams.
  • Implement mesh-quality checks in pre-processing.
  • Start with conservative process settings, then iterate toward final values.
  • Keep software patched and follow Autodesk advisories.