topic Tutorial - Simulate a picking process using Lists in FlexSim Forum

Tutorial - Simulate a picking process using Lists

berkayguz — Mon, 05 May 2025 21:47:42 GMT

Hello,

I'm new to FlexSim and currently trying to build the exact same model shown in the tutorial provided by Autodesk.

https://app.learn-one.autodesk.com/learn/ondemand/curated/work-with-lists-in-flexsim/MFa5PHL2HmKHXqfDqwTU9

I followed all the steps precisely as demonstrated in the video. However, unlike what is shown in the tutorial, the operators in my model do not move or perform the pick action.

Could someone help me identify what might be causing this issue?

Additionally, if there is a completed version of the model from the tutorial, I would really appreciate it if you could share a download link, as I haven't been able to find it anywhere.

If you also happen to have similar models involving operator-based picking logic, I’d be very grateful if you could share them as well — I’m eager to learn from more examples.

Thanks in advance for your support!

Best

Re: Tutorial - Simulate a picking process using Lists

moehlmann_fe — Tue, 06 May 2025 06:27:51 GMT

In the Load and Unload activity the first field should refer to the task sequence created in Create TS.

In Create TS, a task sequence is created and dispatched to the operator. Because "Dispatch and Wait" is checked, the token will wait in that activity until the TS becomes the task executers active task sequence. In other task activities, the first field can either refer to an existing task sequence. In that case the task gets added to that TS. Or it refers to a task executer. Then the task is dispatched to the task executer as a separate task sequence.

So in the current state of your model, Create TS gives a task sequence to the operator who is then waiting for more tasks to get added to it. But in the Load activity a separate task sequence is created for that task, which can't start until the previous one finishes.

You can also check out the written tutorial about task logic in the documentation.

https://docs.flexsim.com/en/25.0/Tutorials/TaskLogic/Tutorial1TaskLogicTools/1-2TasksProcessFlow/1-2TasksProcessFlow.html

Other interesting posts about picking models I found in a quick search are these:

https://forums.autodesk.com/t5/flexsim-forum/picking-multi-boxes/m-p/13592400

https://forums.autodesk.com/t5/flexsim-forum/order-picking-sorted-by-rack-label/m-p/13591439

Re: Tutorial - Simulate a picking process using Lists

chanykE2WUT — Tue, 06 May 2025 07:16:53 GMT

The other issues are

1. You need to change the SlotID to 1 since your Slot per Bay is 1.

2. Set the send to Port on the rack to Do Not Release.

David

Re: Tutorial - Simulate a picking process using Lists

berkayguz — Tue, 06 May 2025 21:09:53 GMT

Thank you for your support!