Unexpected Task sequences

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question

Kyle P asked Sep 14, '18 Kyle P commented Sep 17, '18

Unexpected Task sequences

I am modeling an order picking operation and decided the best route to take was to use a task sequence list. Currently, I am creating the task sequences, pushing them to a list, then having the transporter pull from the list using the OnResourceAvailable trigger.

The problem arises when the transporter completes all the items in the list, it then has additional task sequences which cause an error because there is no flowitem at the location. The transporter is not connected to any centerpoints and profiletasksequence() in the OnReceiveTasksequence trigger does not pick up these rogue task sequences.

I have disabled the OnResourceAvailable trigger and there is no error and the transporter does not receive any rogue task sequences. It is almost as if when it pulls the tasksequence from the queue, it is clearing the ts from the TSList, but not clearing it from the transporter ts queue, if that makes sense?

Any advice on the issue would be greatly appreciated.

Software Version:

FlexSim (other - please specify)

Software Version:

FlexSim 18.0.7

task sequence

lists-fs-stripped.fsm (12.0 MiB)

5 |100000

Attachments: Up to 12 attachments (including images) can be used with a maximum of 23.8 MiB each and 47.7 MiB total.

Answer 1 · 2018-09-15T05:44:06Z

Joerg Vogel answered Sep 15, '18 Kyle P commented Sep 17, '18

The first item of source "SHAPE_SOURCE" has got in the label PickLoc the value "SY_130". The other values are "random#". The Tasksequence transporting this item causes later the error. Probably you delete this item in a sink or by code. The tasksequence lose the reference to the item.

· 1

5 |100000

Attachments: Up to 12 attachments (including images) can be used with a maximum of 23.8 MiB each and 47.7 MiB total.

Kyle P commented · Sep 17, 2018 at 05:48 PM

Thank you for the quick reply. The fixes you suggested seem to have corrected the error. I am going to keep the thread open a couple of days while I work through some things incase the issue arises again. I will accept afterward.

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Answer 2 · 2018-09-15T04:50:34Z

Joerg Vogel answered Sep 15, '18 Joerg Vogel commented Sep 15, '18

Thanks for attaching the model with the error still readable! The description tells the array is out of bounds. The Object "FromSYQueueShape" has an activated option "Use Transport" with the standard reference:

current.centerObjects[1]

But the Queue isn't connected by any center port connections to other objects. Please unmark the use of transport or add a reference that match your needs or do any other mechanism to transfer the task sequence.

· 1

5 |100000

Attachments: Up to 12 attachments (including images) can be used with a maximum of 23.8 MiB each and 47.7 MiB total.

Joerg Vogel commented · Sep 15, 2018 at 04:59 AM

there is still the error you describing above at the transporter "SY_SHAPE_CRANE":

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