Python error: cannot operate on a closed database

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Whitney Lisenbee

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Jun 1, 2022, 3:37:21 PM6/1/22

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Hello! I got this error when trying to delineate a watershed from an existing watershed. It seemed like strange python bug so I tried starting a new QSWAT+ project from scratch but I received the same error at the create streams stage.

I am not sure what I can do about a programming error. Is this just a bug or can we troubleshoot around it?

2022-05-31T12:09:25 WARNING Traceback (most recent call last):
File "C:\Users/whitn/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\QSWATPlus3_9\QSWATPlus\globals.py", line 475, in writeProjectConfig
cur = conn.cursor()
sqlite3.ProgrammingError: Cannot operate on a closed database.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "C:\Users/whitn/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\QSWATPlus3_9\QSWATPlus\delineation.py", line 1505, in runTauDEM1
self.runTauDEM(None, False)
File "C:\Users/whitn/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\QSWATPlus3_9\QSWATPlus\delineation.py", line 1548, in runTauDEM
self._gv.writeProjectConfig(0, 0)
File "C:\Users/whitn/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\QSWATPlus3_9\QSWATPlus\globals.py", line 515, in writeProjectConfig
conn.commit()
sqlite3.ProgrammingError: Cannot operate on a closed database.

Antonio Carmona

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Jun 8, 2022, 11:28:34 AM6/8/22

to QSWAT+

Hello,

I would review the limits and extension of the DEM. In my case, this error appeared because a vertex of the basin did not have its DEM pixel. It was a bit smaller and i couldn't see it. I suppose the coordinate system is the same.