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AMIT KUMAR avatar image
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AMIT KUMAR asked Jeanette F commented

Model simulation run slow on max runtime and hangs

06 - Copy.fsmI am not able to simulate this model for 3-4 weeks.

FlexSim 20.2.3
slow run timemodel hang
06-copy.fsm (15.6 MiB)
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5 |100000

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Jeanette F avatar image Jeanette F ♦♦ commented ·

Hi @AMIT KUMAR, was Felix Möhlmann'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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Felix Möhlmann avatar image
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Felix Möhlmann answered

You have a lot of instances where you needlessly send tokens around a loop up to a hundred times a second.

One example is the subflow for the operator breaks. As long as nothing can be acquired, the tokens loop around constantly due to the Max Wait Time setting.

1678951336844.png

That setting is meant for cases where you want to have logic in the form of (Try to acquire X, if unsuccessful, do something else). There is no "do something else" here, the token can only continue to the activities below "Breaks Logic" once it acquired an operator. So using a Max Wait Time doesn't make sense in this case. You can just use a single activity and have the token wait until it acquired an operator.

1678952219537.png

As I said there are multiple instances of this in your model, some with Acquires/Resource and some with Pull from Lists/Lists. Example for a case with a list is shown below.

1678952277718.png

A similar thing happens at different points where the tokens constantly checks a value in a global table. Instead you should do the check and if the value is not "correct" yet, have the token wait until an event that (possibly) changes this value happens. Depending on where this value is set, this could a token exiting a certain activity or an item in the 3d model being moved in/out of a certain object.

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