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Question

Cloud - Forms - LFF5408 error on exclusive gateway

Laserfiche Cloud Forms
Updated March 22, 2024
asked on March 21, 2024

Hello,

I'm working on a fairly simple Forms process. Process diagram below:


Not sure what Laserfiche thinks the problem is on the Signal Catch activities, as they're working fine. Regardless, the process terminates when it hits the Exclusive Gateway that I have selected with an "LFF5408" error - "Routing cannot be split to any subsequent branch. XPath evaluation may fail for every possible condition. [LFF5408-RoutingConditionMayFail]"

I have a default path specified, but it doesn't even take that path. What am I doing wrong here?

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SELECTED ANSWER
replied on March 22, 2024

I might be wrong - but I don’t think it is actually the Gateway that is having the issue. I believe you need to have a path out of the two signal catch activities to tell it what to do with that particular part of the flow.  Your original screenshot shows a red box around each of those, likely for this reason.  Try adding an End Event in between those two User Tasks and running a path from each of the two Signal Catch activities to that End Event activity.  It doesn’t end the whole process, just that one path.

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Replies

replied on March 21, 2024

It looks like your signal throw sends back to the previous tasks or is there a different signal catch that is not showing?  From what I see here, it doesn't look like it would ever make it to the Exclusive Gateway.

 

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replied on March 21, 2024

Hi Craig,

The signal throw interrupts the user task that hasn't been completed yet, which seems to be working. Screenshot of a terminated instance below:

 

It ends/terminates at the Exclusive Gateway.

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SELECTED ANSWER
replied on March 22, 2024

I might be wrong - but I don’t think it is actually the Gateway that is having the issue. I believe you need to have a path out of the two signal catch activities to tell it what to do with that particular part of the flow.  Your original screenshot shows a red box around each of those, likely for this reason.  Try adding an End Event in between those two User Tasks and running a path from each of the two Signal Catch activities to that End Event activity.  It doesn’t end the whole process, just that one path.

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replied on March 22, 2024 • Show version history

Sharp as always, Matthew. I added an End Event and attached both Signal Catch activities to it and now it progresses as expected. Thanks!

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