Segmentation fault for SIMULINK version in linux

[abhineet-gupta]

Bug description
Cannot run the simulink version of OpenFAST due to segmentation fault. The s-function compiles without any issues.
This behavior exists in both main(718d46f) and dev(216bccb) branches.
I am showing the results from the dev brach as the main branch has an bug where simulink errors are not reported.

System Details
Linux Mint 20.1, MATLAB 2020b, openblas, gcc and gfortran

To Reproduce
Following options were used ()

1. cmake .. -DBUILD_OPENFAST_SIMULINK_API=ON -DBUILD_SHARED_LIBS=ON
2. make
3. make install

Screenshots, if applicable
The crash report is attached

OpenFAST Version
dev(216bccb)

matlab_crash_dump.txt

[andrew-platt]

Which model are you testing with?

[abhineet-gupta]

I modified the "Run_OpenLoop.m" to run the 5MW_Land_BD_Linear turbine.

[andrew-platt]

Did the original "Run_OpenLoop.m" also experience a segmentation fault?

[abhineet-gupta]

With the AOC_Wst turbine, I get a weird error shown below.

%%%%%%%%%%%%%%%%%%%
Error reported by S-function 'FAST_SFunc' in 'OpenLoop/FAST Nonlinear Wind Turbine/S-Function':
FAST_InitializeAll: IfW_Init:IfW_UniformWind_Init: Could not read upflow column in uniform wind files. Assuming
upflow is 0.
FAST_InitializeAll:SrvD_Init:SrvD_ReadInput:ReadPrimaryFile:Invalid logical input for file
"/home/abhineet/Documents/MyOpenFAST/openfast/reg_tests/r-test/glue-codes/openfast/AOC_WSt/AOC_WSt_ServoDyn.dat"
occurred while trying to read CompNTMD.
%%%%%%%%%%%%%%%%%%%%%

[andrew-platt]

the format of the ServoDyn input file has changed between v2.5.0 and what is currently in the dev branch. The CompNTMD keyword was used v2.5.0 release (main branch), but not in the current dev branch. So it looks like you are running the input files from the dev branch with the v2.5.0 compiled version of OpenFAST.

[abhineet-gupta]

I checked out the 'dev' (e0a73e19) branch of the r-test submodule.

I get the following error for AOC_Wst
%%%%%%%%%%%%%%%%%
Error using Run_OpenLoop (line 15)
Error reported by S-function 'FAST_SFunc' in 'OpenLoop/FAST Nonlinear Wind Turbine/S-Function':
FAST_InitializeAll: IfW_Init:IfW_UniformWind_Init: Could not read upflow column in uniform wind files. Assuming
upflow is 0.
FAST_InitializeAll:SrvD_Init:SrvD_ReadInput:ReadPrimaryFile:Invalid logical input for file
"/home/abhineet/Documents/MyOpenFAST/openfast/reg_tests/r-test/glue-codes/openfast/AOC_WSt/AOC_WSt_ServoDyn.dat"
occurred while trying to read CompNTMD.
%%%%%%%%%%%%%%%%%%%

but I get an error instead of segmentation fault for 5MW_Land_BD_Linear
%%%%%%%%%%%%%%%%%%%%%%%
Error using Run_OpenLoop (line 15)
Error reported by S-function 'FAST_SFunc' in 'OpenLoop/FAST Nonlinear Wind Turbine/S-Function':
FAST_InitializeAll:FAST_Init:ValidateInputData:LinOutJac can be used only when LinInputs=LinOutputs=2.
FAST_InitializeAll:ED_Init:ED_CalcContStateDeriv:LAPACK_DGETRF: illegal value in argument -4.
%%%%%%%%%%%%%%%%%%%%%%%

[abhineet-gupta]

I had also tried running the simulations for 'main' branches and got errors as well.
I can rerun those and share the errors if that helps in debugging.
(The main branch had a bug that simulink errors were not displayed (fixed in the dev branch) so I thought that might be less useful for bug reporting. )

[andrew-platt]

Since your error message states occurred while trying to read CompNTMD, the OpenFAST version that simulink is running is not the dev version. What version does OpenFAST report in the first few output lines?

[abhineet-gupta]

The OpenFAST output says:

%%%%%%%%%%%%%%%%%%%%%%%
OpenFAST-v2.4.0-133-gb913c945-dirty
Compile Info:

• Compiler: GCC version 9.3.0
• Architecture: 64 bit
• Precision: double
• Date: Jan 5 2021
• Time: 21:12:45
  Execution Info:
• Date: 04/26/2021
• Time: 09:48:55-0500
  %%%%%%%%%%%%%%%%%%%%%%%

Also, heres a screenshot of my git log

[andrew-platt]

commit b913c94 is on the main branch from 4 months ago. Can you recompile your currently checked out version and rerun the create_FAST_SFunc.m script? I would expect to see the git hash ending in -g216bccbf in the OpenFAST output if you actually are using the dev version that is checked out.

[abhineet-gupta]

Just to make sure, when you say recompile, you mean I should run the following commands (with the current checked out version)

1. cmake .. -DBUILD_OPENFAST_SIMULINK_API=ON -DBUILD_SHARED_LIBS=ON
2. make
3. make install

[andrew-platt]

Yes. First though, delete everything in the build directory (rm -rf * inside the build directory). This will make absolutely certain that there are no leftover modules from a prior build.

You may also want to get the recent tags (git doesn't grab them by default for some reason): get fetch --all --tags

[abhineet-gupta]

Alright, will do.

[bjonkman]

The segmentation fault could be due to a conflict in LAPACK libraries between Matlab and OpenFAST. I'd recommend looking at #482 (particularly the last comments on that issue) to see if that helps.