topic Re: FLOOR STORAGE, PULL REQUIREMENT CODE [bug or not?] in FlexSim Forum

FLOOR STORAGE, PULL REQUIREMENT CODE [bug or not?]

fapicella — Mon, 28 Sep 2020 08:01:47 GMT

[ FlexSim 20.2.2 ]

Hi,

I realize this very simple model and I noticed an unusual behavior of the FloorStorage. When the FloorStorage is full and there is the first OnExit from it, even if a flowitem is ready to enter, the slot that has become free remains free. After another OnExit both the slots are replenished. I expected that immediately after the first OnExit the slot would be filled.

I realize the model in a very simple way:

drag and drop in the model a Source, a Conveyor, a FloorStorage and a Sink.
A-connection between Source and Conveyor, between Conveyor and FloorStorage and between FloorStorage and Sink.
in the Flow tab of the FloorStorage insert a MinimumDwellTime of 3000 seconds.

To avoid the situation explained above, I modified the pullrequirement code.errorcode_rack.fsm

As you can see in the pictures below, I add the exitListener treenode value only if this value doesn't exists and I add it with EVENT_LISTEN_ONCE modality in the function "eventlisten".

Also when the code runs the openinput command, I noticed that we need a zero time waiting to separate the OnExit and immediately after the OnEntry events. In this way, when we assign the slot to the Flowitem OnExit from Conveyor, the slot is free in the warehouse because the OnExit event in the werehouse has already occurred. Previously, the assignment took place simultaneously and the slot, being still occupied, was not assigned. I generate this zero delay sending a message to the current object in zero seconds.

It's right my reasoning? We can consider this as a bug? I attach the model to the question.

@phil.bobo

thanks for the support.

Re: FLOOR STORAGE, PULL REQUIREMENT CODE [bug or not?]

philboboADSK — Wed, 30 Sep 2020 16:12:18 GMT

Yes, this is a bug. Your solution is good. You can also fix it using the delayednodefunction() command instead of Object.message(). Using delayednodefunction(), all of the code can be in one trigger.

I've updated the code for the next bugfix release. Thanks.

Re: FLOOR STORAGE, PULL REQUIREMENT CODE [bug or not?]

Ben_WilsonADSK — Mon, 05 Oct 2020 17:02:13 GMT

Hi @Fiorenzo A, was phil.b's answer helpful? If so, please click the red "Accept" button on their answer. Or if you still have questions, add a comment and we'll continue the conversation.

If we haven't heard back from you within 3 business days we'll auto-accept an answer, but you can always unaccept and comment back to reopen your question.

Re: FLOOR STORAGE, PULL REQUIREMENT CODE [bug or not?]

fapicella — Tue, 06 Oct 2020 15:00:43 GMT

yes, it is! But I forgot to accept! Now I do that!