topic Re: eading geometry through Search Cursor ... runtime error says it cannot open file! in Python Questions

eading geometry through Search Cursor ... runtime error says it cannot open file!

Seyed-MahdySadraddini — Tue, 24 Jan 2023 20:13:53 GMT

I am trying to read and use the geometries of a polygon layer, row by row, using Search Cursor. I am getting a very strange runtime error, but I cannot figure out the source of this error! My first time getting this runtime error!

Traceback (most recent call last):
File "C:\Documents\ArcGIS\Projects\Census\Redistribute_Home.py", line 75, in <module>
with arcpy.da.SearchCursor(from_shape, ['SHAPE@', 'FIRST_city', 'FIRST_ccid', 'FIRST_NUMBER_OF_DIVISIONS']) as search:
RuntimeError: cannot open 'ON1996_DissolveOnName'

First time seeing this runtime error. It says it cannot open the layer, but there isn't anything striking me to be wrong in my code!

# this is the workspace
arcpy.env.workspace = os.path.join(directory, gdb + '/' + fds) # gdb and fds are text strings

# the layer to create divisions from
from_shape = layer # 'ON1996_DissolveOnName' is the value of the layer

Again, here is the part of the code that runs into error

with arcpy.da.SearchCursor(from_shape, ['SHAPE@', 'FIRST_city', 'FIRST_ccid', 'FIRST_NUMBER_OF_DIVISIONS']) as search:

Another question is whether using SHAPE@ token to read the geometry for each of the

Re: eading geometry through Search Cursor ... runtime error says it cannot open file!

JohannesLindner — Tue, 24 Jan 2023 20:30:46 GMT

The error is telling you that it can't open ON1996_DissolveOnName, probably because it can't find it.

So:

are you running this in the Python window, a toolbox or as standalone script?
ArcGIS Pro or ArcMap?
If you're running this in the Python Window, does the current map actually have a layer called "ON1996_DissolveOnName"?
How do you declare the variable layer? The full script could be helpful.

To post code:

Re: eading geometry through Search Cursor ... runtime error says it cannot open file!

JohannesLindner — Tue, 24 Jan 2023 20:31:34 GMT

Oh, also, your second question got cut short:

Another question is whether using SHAPE@ token to read the geometry for each of the

Re: eading geometry through Search Cursor ... runtime error says it cannot open file!

Seyed-MahdySadraddini — Tue, 24 Jan 2023 20:51:20 GMT

Hmmm... the path to the file is correct, and the file is there! This is what makes it very strange...!!

Re: eading geometry through Search Cursor ... runtime error says it cannot open file!

Seyed-MahdySadraddini — Tue, 24 Jan 2023 20:52:36 GMT

Sorry, it is perhaps an irrelevant question now.

Re: eading geometry through Search Cursor ... runtime error says it cannot open file!

Seyed-MahdySadraddini — Tue, 24 Jan 2023 21:28:41 GMT

Actually there was an error in the path... hard to see!