Runtime stats under Matlab/Simulink

[ahgambier]

Dear all,
I am using the FAST_SFunc v.4.1.1 under Matlab R2025a. Sometimes (in a very random way), OpenFAST delivers some runtime stats (CPU time, simulation time, real time, etc.). I would like to control this output (i.e., to have this info permanently). Is there a specific keyword in the input file that can be set to control the runtime stats?
Thank you very much for your help!
Adrian

[jjonkman]

Dear @ahgambier,

I would expect OpenFAST to report runtime stats for very simulation, not randomly. Can you clarify what you are seeing otherwise? Perhaps it is related to how you are running the code?

Best regards,

[ahgambier]

Dear Jason,
thank you for your answer.
The runtime stats are always present in openfast_x64.exe. The behavior that I am describing is only under Matlab/Simulink. Actually, the stats are normally not in the output. Therefore, I thought this is not a characteristic implemented in the SFunction. I set, however, once the Echo function to true, and the output included the runtime stats. Later, setting Echo true/false several times did not have any effect on the stats, which disappeared again.
I am doing only normal simulations, setting option 4 for the controllers in ServoDyn.
Best regards,

The full output in Matlab is the following:

---

OpenFAST

Copyright (C) 2025 National Renewable Energy Laboratory
Copyright (C) 2025 Envision Energy USA LTD

This program is licensed under Apache License Version 2.0 and comes with ABSOLUTELY NO WARRANTY.
See the "LICENSE" file distributed with this software for details.

---

Compile Info:

• Compiler: Intel(R) Fortran Compiler 20250001
• Architecture: 64 bit
• Precision: single
• OpenMP: No
• Date: Jul 25 2025
• Time: 01:47:35
  Execution Info:
• Date: 07/29/2025
• Time: 19:23:13+0200

OpenFAST input file heading:
IWT 7.5 MW Vesion: OpenFAST 4.1.1, Rev. 3 by Adrian Gambier on Juli 12, 2025.

Running ElastoDyn.
Running InflowWind.
Running AeroDyn.
AeroDyn: projMod: 1
Projection: legacy (NoSweepPitchTwist), BEM: legacy (2D)
Warning: Turning off Unsteady Aerodynamics because C_nalpha is 0. (node 1, blade 1)
Warning: Turning off Unsteady Aerodynamics because C_nalpha is 0. (node 1, blade 2)
Warning: Turning off Unsteady Aerodynamics because C_nalpha is 0. (node 1, blade 3)
Running ServoDyn.

Time: 0 of 206.5 seconds.

Warning: block 'IWT_75mw_OP/IWT 7.5 MW-Wind Turbine
OpenFAST/S-Function':
FAST_Solution:FAST_UpdateStates:CalcOutputs_And_SolveForInputs:SolveOption2:AD_CalcOutput:RotCalcOutput:BEMT_CalcOutput(node 2, blade 1):UA_CalcOutput:UA_BlendSteady:Temporarily turning off UA due to high angle of attack or low relative velocity. This warning will not be repeated though the condition may persist.

OpenFAST completed.