topic Re: How to fix this error: "Label does not exist..."? in FlexSim Forum

How to fix this error: "Label does not exist..."?

sara_s2 — Tue, 12 Nov 2019 12:04:01 GMT

[ FlexSim 19.0.0 ]

Hello,

I am trying to model the process of transporting items (boxes) from the rack to the port 'Queue3'. But when I run the model, I get an error message:

"FlexScript exception: Label property Type retrieved on /Rack1/Tote. Label does not exist. at MODEL:/Tools/GlobalLists/ItemList1>variables/fields/ItemType/expression".

I really don't know how to fix this, help me please !

model1.fsm

Re: How to fix this error: "Label does not exist..."?

joerg_vogel_HsH — Tue, 12 Nov 2019 13:01:31 GMT

You get the exception, because you push the tote to the list in the Send To Port function of the Rack1. The tote has not the label Type nor any other label.

If you want to push the content of the tote onto the list, you can adjust the reference to push:

item.subnodes.toArray()

in the source code editor of the function.

Re: How to fix this error: "Label does not exist..."?

sara_s2 — Tue, 12 Nov 2019 16:15:00 GMT

Thank you for your reply.

I corrected the code, but I still get an error (in the attached two first files). I don't know how I should set the label ItemType to the token !

error.png

model1.fsm

Actually, I am wondering why in other model (attached below) the execution is performed without errors despite the usage of the code that you have mention in the first figure (push-tote-to-list.jpg). The only difference is that in this model, we use pallet instead of tote.

exp2.fsm

Re: How to fix this error: "Label does not exist..."?

tanner_p — Tue, 12 Nov 2019 20:10:45 GMT

Hi @sara S2,

In the example you sent called "exp2", the Process Flow logic is connected to lists and resources and it runs properly.

The other example, "model1", is not connected to any lists or resources, so the tokens can't pull items, acquire operators, or assign labels. Have you reviewed the Process Flow tutorials in the User Manual to learn how these PF activities work?

I think it would be beneficial to review some of those tutorials so that you can properly connect the activities in PF to the 3D.

Re: How to fix this error: "Label does not exist..."?

tanner_p — Tue, 12 Nov 2019 20:46:59 GMT

This is nowhere near complete, but I've updated the model so far that it doesn't crash. Hopefully this makes it easier to work on it.

updated-labels-and-pf.fsm

Re: How to fix this error: "Label does not exist..."?

sara_s2 — Thu, 14 Nov 2019 09:58:29 GMT

Thank you @tanner.p.