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Autodesk Moldflow Error 99998 Best -

Technical Report: Resolving Autodesk Moldflow Error 99998

Date: Current
Software: Autodesk Moldflow Insight / Adviser
Error Code: 99998
Common User Query: "Error 99998 best solution"

Summary

Error 99998 in Autodesk Moldflow commonly indicates a numerical or solver failure during simulation. It usually arises from mesh quality issues, problematic geometry or boundary conditions, material or processing setup errors, or insufficient solver resources. This guide explains likely causes, step-by-step troubleshooting, and recommended fixes to resolve Error 99998 and successfully complete simulations. autodesk moldflow error 99998 best

3. Verify System Requirements

Ensure your computer meets the minimum system requirements for running Autodesk Moldflow. Insufficient hardware resources can lead to software instability. Review System Requirements: Visit the Autodesk website to

  • Review System Requirements: Visit the Autodesk website to review the system requirements for Moldflow.

3. Material and Data Corruption

  • Corrupted Study File: The .mpi or study file may have database corruption.
  • Material Data Mismatch: Using a material record with incomplete rheological data (e.g., missing viscosity curves) in a calculation mode that requires them.

3. Material Data Incompatibility

  • Specifically: Using a 2D viscosity model (Cross-WL) on a part that requires fiber orientation or vice versa.
  • Why it fails: The governing equations become inconsistent.

The 5 Best Causes of Error 99998 (Why It Happens)

Before fixing it, you must understand the root cause. Through analyzing hundreds of support cases, these are the top 5 triggers: test the process settings.

4. Boundary Condition Conflicts

  • Specifically: Over-constrained cooling circuits or conflicting runner/valve gate timers.
  • Why it fails: The solver cannot resolve contradictory physical laws.

Step 4: The "New Study" Test

If the file is corrupted:

  1. Create a New Study.
  2. Import the CAD model fresh.
  3. Generate a new mesh using default settings.
  4. Apply the same material and process settings.
  5. If the new study runs, the original file was corrupted.

Step 3: Simplify the Study (Isolation Testing)

If the mesh passes diagnostics, test the process settings.

  1. Test A: Change the analysis technology from "Dual Domain" to "Midplane" (if possible) to see if geometry complexity is the issue.
  2. Test B: If using a complex Valve Gate system, turn off the valve gates (set them to always open) to see if the logic is causing the crash.
  3. Test C: Reset Process Settings to default. Sometimes a manual entry like "Ram Speed %" vs "mm/s" can cause unit conflicts if the data is missing.