OpenVSP Python Scripting

Isaac Kocherla

unread,

Jun 24, 2020, 3:38:50 PM6/24/20

to OpenVSP

Hello

When I am combining NDARC solution to OpenVSP to generate a .vsp3 file using Alpine, I get this error

Reading solution file...

Traceback (most recent call last):

File "C:\Users\admin\AppData\Local\Temp\alpine_job1712764679325115039\run.py", line 3, in <module>

test = alpineVehicle.vehicle('tiltwingTE.soln', 'AlpineGenerated', '')

File "C:\ProgramData\Anaconda3\envs\aiden_env\lib\site-packages\alpine-2.0-py3.6.egg\alpine\Core\alpineVehicle.py", line 29, in __init__

self.geom, self.weights = parseSolution.GeomParse(solnfile)

File "C:\ProgramData\Anaconda3\envs\aiden_env\lib\site-packages\alpine-2.0-py3.6.egg\alpine\Core\parseSolution.py", line 102, in GeomParse

geom['area_panel{}_w{}'.format(p+1,j+1)]= soln['WING'][j]['AREA_PANEL'][p]

File "C:\ProgramData\Anaconda3\envs\aiden_env\lib\site-packages\rcotools-2.0.2-py3.6.egg\rcotools\utils\parser_support.py", line 533, in __getitem__

raise IndexError(msg)

IndexError: Requested index is 0, indices less than 1 are not allowed.

Thanks,

Isaac Kocherla

Chris Silva

unread,

Jun 25, 2020, 9:14:02 AM6/25/20

to OpenVSP

The problem is that the latest version of RCOTOOLS (2.0.6) has changed from zero-based indexing of arrays (Python style) to 1-based indexing (Fortran and natural counting style). This was an attempt to make the indexing less confusing, but naturally has rippling consequences. Solution for now is to either go to an earlier version of RCOTOOLS, wait for a fix (planned for next week or two) or go in and edit the scripts in ALPINE for 1-based indexing (may be a lot of work for little gain).

Isaac Kocherla

unread,

Jun 26, 2020, 4:37:38 PM6/26/20

to OpenVSP

Hi,

I have reinstalled RCTOOLS(2.0.0). I got a new error,

Reading solution file...

Traceback (most recent call last):

File "C:\Users\admin\AppData\Local\Temp\alpine_job7879997342491394283\run.py", line 3, in <module>

test = alpineVehicle.vehicle('Solution.soln', 'AlpineGenerated', '')

File "C:\ProgramData\Anaconda3\envs\aiden_env\lib\site-packages\alpine-2.0-py3.6.egg\alpine\Core\alpineVehicle.py", line 55, in __init__

self.vehicle['cfg'] = cfg

AttributeError: 'vehicle' object has no attribute 'vehicle'

Thanks,

Isaac Kocherla

Chris Silva

unread,

Jun 27, 2020, 2:02:57 PM6/27/20

to OpenVSP

Not sure how you ended up with your line 3 in run.py. There is no default vehicle configuration, so you should be specifying a configuration (e.g. 'helicopter', 'coaxial', 'tilt rotor', 'tandem'), and in any event, you should not be specifying an empty string for configuration.

Isaac Kocherla

unread,

Jun 29, 2020, 12:13:43 PM6/29/20

to OpenVSP

Hello Chris,

Thank you, that worked. I am able to generate the .vsp3 files

Thanks,

Isaac Kocherla

Samiul Hassan

unread,

Sep 4, 2021, 12:37:49 PM9/4/21

to OpenVSP

Hello. Hope everyone is doing well.

I am facing the same error "Requested index is 0, indices less than 1 are not allowed" while trying to run to the "test.py" file provided with the Alpine file. And I am using RCOTOOL-2.1.3.