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Patch intermittently fails to run in Canvas app

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Posted on by RobHCRT

We have a Canvas app where, following approval of request, a member of staff from the finance team go back into the form, update a particular field, and click a button to "Complete" the request.

The code for the button runs Patch() to update the form data, and then runs a flow. I've just run a monitored session with one of the team, hoping to see an error message indicating why the Patch() was failing. The member of staff updated three records as normal, and clicked the "Complete" button for each.

The Patch() succeeded on the first and third item updates, but there's no evidence that an attempt was made to run it on the second. No conditions are set, and so it should run each time the button is clicked (the flow was triggered successfully each time):

Any suggestions on what to look at next would be welcome.

Thank you,
Rob.

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Building Power Apps

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iAm_ManCat 18,256 Most Valuable Professional on at

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Can you provide the code you are using for the patch and run please?

I would advise to set the patch to a variable, then:
if the variable contains data run the flow, otherwise notify there was an error saving

something like this:

//Clear it first so that any previous patches aren't causing false positives Set(PatchedItem, Blank()); //set the output to a variable, which will store the record it was patching Set(PatchedItem, Patch(listname, ThisItem, {thingToPatch: valuetoPatch})); If( IsBlank(PatchedItem.thingToPatch), Notify("There was an error saving", NotificationType.Error), //else run the flow if patch succeeded FlowName.run() )

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RobHCRT 7 on at

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Thanks, @iAm_ManCat, have updated the code to check whether the return from Patch() is blank, and that's at least stopping the completion process half-succeeding, so the users can retry.

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