Profile Task Sequence Error

[miguel_p9]

[ FlexSim 21.0.5 ]

Hi,

In a task sequence where the task executors have to load and unload Bags i'm having a Profile Task Sequence Error when i need to load the "2nd time".

When both Task Executors do the first load and unload it's okay but when they reach the load for the 2nd time after a "More Items to Load" = Yes; this prompt error appears:

How can i solve it?

Aeroporto.fsm

Thanks, Miguel Pereira.

[roi_sn · Accepted solution]

Hi @Miguel Pereira, you are trying to load and unload continuously the same item referenced on 'token.BagsIn' label. As Task Executers are unloading this 'token.BagsIn' item in a sink which is called 'ZonaDescarga', these items are destroyed just after the unload. As a result, in the second load &unload cycle, as they are trying to load the same item, the error comes up.

I do not know exactly what you are trying to do but I guess you should have an array of items in order to load and unload one after another.

[miguel_p9]

I'm trying to load those groups of 40-60 bags but 15 at a time, so each task executors should go there 2 or 3 times.

[miguel_p9]

i've made some changes and as you can see i'm using the array in the run sub flow, but it's still not working. I'm not sure if i understood how to do the array but i've did the same way i've learn on a tutorial.

Aeroporto.fsm

Thanks.

[roi_sn]

@Miguel Pereira, if you already create 1 token per baggage to load & unload you don´t need to check if there are more things to load.

[joerg_vogel_HsH]

You work with the index variable creationRank to address the fields of an array. That is OK, but an Array keeps empty fields still as fields and this causes that they are counted as content when you read the length of an array. Once the items are processed, you must empty the array, by assigning an empty array. You can also work with pop() or shift() methods to return a value of an field and erase it from an array, when you unloads finally the items and before they reach a sink.

[miguel_p9]

It doesn't work if i take that decide off because i'm incrementing the label after the finish and it goes to another Queue. I'll try Joerg solution.

[miguel_p9]

I'm sorry @Roi Sánchez & @Joerg Vogel but i deleted the wrong comment.

Anyway, the problem is i unload 60 bags from the plane but the AGV can only load 15 at a time, so i need them to go there twice before another plane comes in.

That is why i had that Decide inside of the subflow.

I've tried to do the unload process inside of another sub flow with a new assign label but still not working.

Aeroporto.fsm

Anyway, with a Queue instead of a sink that problem doesn't occur but there's a new one: is that the AGV are loading again the Bags that they unload (the Queue next to where they start) instead of load again from the Queue next to the plane.

[joerg_vogel_HsH]

As I see it, you pull from your main process. You don't have to run more often inside a subflow, because you don't have the references to the items on the list then. The sub process does one tansport cycle, then for another cycle you need new pulled items.

[miguel_p9]

The problem is i need them to load all bags and i can't wait for another pull process before that, because that pull process means there's more 60 bags incoming...

[eric_m3]

Hi @Miguel Pereira were you able to find a solution to your question? If so, can you accept Roi's answer or post a new answer with the solution? Thanks