Pro 3.1.3: Running an update cursor on a feature layer will break if its Attribute table is open.

AlfredBaldenweck — Wed, 18 Oct 2023 19:10:14 GMT

Kind of a PSA.

I switched to Pro 3.1.3 and was testing some tools I wrote in Pro 2.9.

One works with an input feature layer, which then has an update cursor applied.

It kept failing because it couldn't acquire a lock.

Turns out, that "lock" is created by having the attribute table open.

Things that are definitely not contributing:

The feature class is not being edited, am in fact using manual edit sessions and I'm not in one.
In the tool, the update cursor is wrapped in an editor object.

It is literally just having the attribute table open.

I can't believe this is intended behavior (it's never worked like this before), so I have to assume it's a bug.

Hopefully this saves someone else a huge headache in the future.

Edit to add: This seems to be only a problem when using tools. Python window is fine.

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