Task Error: An invalid task has been encountered

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question

sara S2 asked Nov 16 2019 at 12:06 PM Matthew Gillespie answered Dec 05 2019 at 10:11 PM

Task Error: An invalid task has been encountered

Hello,

I get an error (in the attached figure) when I run my model (attached below). I really don't know how to deal with this. Please help !

error.png

model1.fsm

itemlist and processflow

error.png (5.4 KiB)

model1.fsm (69.6 KiB)

· 5

Joerg Vogel commented · Nov 18 2019 at 2:35 AM

The unload task hasn’t got a reference for an item to unload.

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sara S2 Joerg Vogel commented · Nov 18 2019 at 10:57 AM

Thank you @Jörg Vogel for your reply.

But I think that the unload task has the item reference in the custom code (1) as mentioned in the figure below. If this is not correct, would you please explain the problem in more details? thank you again.

fig1.png

0 ·

fig1.png (142.5 KiB)

Joerg Vogel sara S2 commented · Nov 18 2019 at 1:14 PM

Hello @sara S2, if I run your model and let it execute step by step near the runtime of the error, I get the labels of the token in the sublow as you can see it in the picture file. Unfortunately there isn't a reference like you posted before. There is only a reference to the tote in the rack at the token. While I step through the activities of this token, I noticed that the token doesn't let execute the loading subflow process. Perhaps you build a process flow with a simpler model to test the basic functionality, before you insert the results into the working model.

0 ·

no-item-reference.jpg (118.5 KiB)

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Answer 1 · 2019-12-05T22:11:46Z

Matthew Gillespie answered Dec 05 2019 at 10:11 PM

I answered this same question here:

https://answers.flexsim.com/questions/75867/why-the-operator-cannot-load-the-changed-number-of.html

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