Dear all,
I have been trying to load, initialize, and run a GMAT-script using the
provided Python API:
import gmat_py as gmat # the one in the *R2022a/bin/gmatpy/_py38/* folder
gmat.LoadScript('/home/m07/Desktop/MSE/THESIS/RACCOON/Scripts/Optimization/test.script')
gmat.Initialize()
gmat.ShowObjects()
gmat.RunScript()
The script contains subscribers and event locators, such as:
- OrbitView
- OpenFramesInterface
- ReportFile
- GroundTrackPlot
- XYPlot
- ContactLocator
For the subscribers, the only informative error description I get is:
> *APIException: Subscriber Exception:
> Subscriber::SetActualWrapperReference() "XYPlot1" failed to set reference
> for object named "cubesat1.UTCModJulian." The wrapper is NULL.*
>
Notice the dot symbol at the "*cubesat1.UTCModJulian*", it doesn't exist in
the script. Once I delete the related block of code in the GMAT-script, the
following error is thrown for every other subscriber as well. The exception
message is contained in the *R2022a/plugins/libEventLocator.so *shared
library.
Once I get rid of the subscriber section in the GMAT-script, I get the
ContactLocator errors:
> *APIException: Event Exception Thrown: Error setting observers on
> ContactLocator Contact_Sat1_GS1. All observers must be either ground
> stations or spacecraft. *
In the GMAT-script, a contact locator refers to a spacecraft as an observed
object (Target) and a ground station as an observer. When run via GMAT GUI,
the script successfully finishes, all report files are generated, plots and
3-D visualization rendered alright.
These issues prevent me from trying optimization Python codes in pair with
GMAT.
How could I solve this?
Thank you in advance.
Best regards,
Mike
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