Invalid numerical input for file "IEA-22-280-RWT-Monopile.fst" occurred while trying to read Gravity

Wind & Water Computer-Aided Engineering Software Tools
1

Hi,

I was trying to use OpenFAST for the IEA 22MW RWT. I have downloaded the binaries for Release v4.1.2 and also the files for the IEA22MW RWT. I have also placed the libdiscon.dll file corresponding to ROSCO version 2.9.0 in the same folder. However, I get the following error when I try to run a simulation:

OpenFAST-v3.5.3
Compile Info:

  • Compiler: Intel(R) Fortran Compiler 2021
  • Architecture: 64 bit
  • Precision: single
  • OpenMP: No
  • Date: Apr 11 2024
  • Time: 20:51:36
    Execution Info:
  • Date: 11/07/2025
  • Time: 11:48:32+0100

OpenFAST input file heading:
Generated with AeroElasticSE FAST driver

FAST_InitializeAll:FAST_Init:FAST_ReadPrimaryFile:Invalid numerical input for file
“IEA-22-280-RWT-Monopile.fst” occurred while trying to read Gravity.

OpenFAST encountered an error during module initialization.
Simulation error level: FATAL ERROR

Aborting OpenFAST.

I have tried checking the input .fst file for any inconsistencies, but couldn’t find anything. Could you please tell me if I have missed something?

Thanks

Abhinav

2

Dear @Abhinav.Abeendranath,

You mention downloading OpenFAST v4.1.2, but the message from your command prompt refers to OpenFAST v3.5.3, so, it doesn’t appear that you are running the version of OpenFAST you are expecting. I’m guessing your input files are incompatible with your OpenFAST version. Documentation on the input file changes with each release of OpenFAST are available from: 4.1.2. API changes between versions — OpenFAST v4.1.2 documentation. And you can always enable the Echo option to debug issues associated with input file formatting.

Best regards,