How to know if a list is empty in processflow

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Cindy asked Feb 26, '24 Jeanette F commented Feb 29, '24

How to know if a list is empty in processflow

In my model i need to decide if there are items in a list that i have in process flow, if the list is empty to follow a different process an if it is not then to pull the item form the list, how can i write that condition in the decide?

I have this structure, and i also have the lists in another process

But how can i do to put in the condition that if there is something in list RBC1 pull form list and if there is not then do another thing?

Software Version:

FlexSim 23.0.0

processs flow conditional using lists

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· 1

Jeanette F ♦♦ commented · Feb 29 at 06:20 PM

Hi @Cindy, was Paula LG's answer helpful? If so, please click the "Accept" button at the bottom of their answer. Or if you still have questions, add a comment and we'll continue the conversation.

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Answer 1 · 2024-02-26T16:23:51Z

Paula LG answered Feb 26, '24 Paula LG edited Feb 27, '24

Hi Cindy,

What you want to do can be accomplished without asking if the list has any items in it.

The "Pull from List" activity itself has a feature called "Use Max Wait Timer". It is used so that the token stays in the activity for the number of seconds you specify and, if it's not able to pull anything from it, it is released through the specified port.

You can enable the max wait timer in all your pull activities with a time of 0 s and, if the list is empty, the token won't pull anything and will be released through another port of your choosing. It should look like this:

I hope it helps!

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