What changes in ExtPtfm module from OpenFast 2.0 to OpenFast 2.6?

[alessandrazappulla]

HI everyone,
I'm working on a project developed with OpenFast 2.0, but I have OpenFast 2.6 so I changed manually the input files. Running Matlab code I have this problem:

**Copyright (C) 2021 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.

---

OpenFAST-Unversioned from bbbb1ca
Compile Info:

• Compiler: Intel(R) Fortran Compiler 2021
• Architecture: 64 bit
• Precision: single
• Date: Jun 07 2021
• Time: 23:07:09
  Execution Info:
• Date: 10/02/2021
• Time: 20:18:25+0200

OpenFAST input file heading:
FAST Certification Test #18: NREL 5.0 MW Baseline Wind Turbine (Onshore)

Running ElastoDyn.
Running AeroDyn.
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 2, blade 1)
Warning: Turning off Unsteady Aerodynamics because C_nalpha is 0. (node 3, 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 2, blade 2)
Warning: Turning off Unsteady Aerodynamics because C_nalpha is 0. (node 3, blade 2)
Warning: Turning off Unsteady Aerodynamics because C_nalpha is 0. (node 1, blade 3)
Warning: Turning off Unsteady Aerodynamics because C_nalpha is 0. (node 2, blade 3)
Warning: Turning off Unsteady Aerodynamics because C_nalpha is 0. (node 3, blade 3)
Running InflowWind.
Running ExtPtfm_MCKF.
ErrMess
Invalid logical input for file "C:\Users\HP\Desktop\dati-FAST1\Cases_02-10-2021
_20-18\Amp10deg_Freq010Hz_Tilt5deg_Phase0deg_Yaw0deg_wake2_AFAero2_20211002_201
825\5MW_Baseline/ExtPtfm_11mps.dat" occurred while trying to read Echo.

FAST_InitializeAll:ExtPtfm_Init:ExtPtfm_ReadPrimaryFile:Invalid logical input for file
"C:\Users\HP\Desktop\dati-FAST1\Cases_02-10-2021_20-18\Amp10deg_Freq010Hz_Tilt5deg_Phase0deg_Yaw0d
eg_wake2_AFAero2_20211002_201825\5MW_Baseline/ExtPtfm_11mps.dat" occurred while trying to read
Echo. Line: 4.

� FAST encountered an error during module initialization. ****
Simulation error level: FATAL ERROR

Aborting OpenFAST.

ReadFASTtext::Error -1 reading from file, "C:\Users\HP\Desktop\dati-FAST1\Cases_02-10-2021_20-18\Amp10deg_Freq010Hz_Tilt5deg_Phase0deg_Yaw0deg_wake2_AFAero2_20211002_201825\Prova11mps_Open.out"
Unable to perform assignment because the indices on the left side are not compatible with the size of the right side.

Error in Main_mod (line 94)
AoA(blade,:,ii)=Channels(:,find(strcmp(ChanName,Alpha)));**

I understand that the module ExtPtfm is not compatible with OpenFast 2.6, but according to https://openfast.readthedocs.io/en/main/source/user/api_change.html there aren't any changes between 2.0 and 2.6. So, what is the problem?

Hopig to be clear enough, thank you.

[ebranlard]

Hi,

The ExtPtfm module has now two input files, one for the module, and one for the superelement (SE).
You can try to adapt your inputs based no the following test case (for OpenFAST 3.0):
https://github.com/OpenFAST/r-test/tree/main/glue-codes/openfast/5MW_OC4Jckt_ExtPtfm

We will try to add documentation soon.

Emmanuel

[alessandrazappulla]

Hi, thank you for your answer!
After several researches I found the same link you have attached and I solved the problem.

Thank you again,
Alessandra

[ebranlard]

If you are interested, feel free to checkout the documentation, currently, here:

https://ebranlard-openfast.readthedocs.io/en/f-extptfm-doc/source/user/extptfm/index.html

And hopefully it will be merged to dev soon.