topic Re: Need Help with Robot 2 Pallet Unloading Error in FlexSim Forum

Need Help with Robot 2 Pallet Unloading Error

Pooja_inde — Thu, 27 Nov 2025 11:44:48 GMT

Hello Team,

Details:

Robot 2 is configured to unload boxes onto pallets.
In a batch of two pallets, if one pallet is empty, the model shows an error.

Questions:

How can we modify the logic so Robot 2 continues unloading on the available pallet?
How can we ensure the empty pallet moves to the sink automatically?

Attached: Model file for reference.

Re: Need Help with Robot 2 Pallet Unloading Error

FelixMoehlmann — Thu, 27 Nov 2025 17:16:55 GMT

I would suggest to reverse the logic. Push the receiving pallets to a list and make the token that gets triggered by the loaded pallets the one that controls the robot. On that side you know how many items there are on the pallet, so it's easy to run a Load/Unload Sub Flow that many times.

Re: Need Help with Robot 2 Pallet Unloading Error

Pooja_inde — Fri, 28 Nov 2025 05:40:50 GMT

Hi @FelixMoehlmann

I’ve implemented the logic in the model, but I’m facing some errors.

Could you please review the attached file and help me resolve the issues?

Re: Need Help with Robot 2 Pallet Unloading Error

Pooja_inde — Mon, 01 Dec 2025 08:29:35 GMT

Hi @FelixMoehlmann

I’ve implemented the logic in the model, but I’m facing some errors.

Could you please review the attached file and help me resolve the issues?

Re: Need Help with Robot 2 Pallet Unloading Error

FelixMoehlmann — Mon, 01 Dec 2025 13:54:24 GMT

I don't see any changes between this model and the one you originally uploaded.

Another possible solution is to use Decide activities. In the upper flow (arrival at station 8), skip the Push to List and Wait for Event if there are no boxes on the pallet.

In the lower one, skip the second Pull from List, Load and Unload depending on the type of the first item. Like in the other Process Flow section that loads the boxes onto separate pallets.

Re: Need Help with Robot 2 Pallet Unloading Error

Pooja_inde — Tue, 02 Dec 2025 06:18:05 GMT

Hello @FelixMoehlmann

I’ve implemented the logic in the model, but I’m facing some errors.

Could you please review the attached file and help me resolve the issues?

Re: Need Help with Robot 2 Pallet Unloading Error

Pooja_inde — Tue, 02 Dec 2025 10:09:33 GMT

Hello @moehlmann_fe

I’ve implemented the logic in the model, but I’m facing some errors.

Could you please review the attached file and help me resolve the issues?

Re: Need Help with Robot 2 Pallet Unloading Error

Pooja_inde — Wed, 03 Dec 2025 06:33:37 GMT

Hello @moehlmann_fe

Please can you help me with this issue.

I’ve implemented the logic in the model, but I’m facing some errors.

Could you please review the attached file and help me resolve the issues?

Re: Need Help with Robot 2 Pallet Unloading Error

FelixMoehlmann — Wed, 03 Dec 2025 08:03:24 GMT

Again, I don't see that you 'implemented' something. Compared to the previous model some activities were removed but nothing new added.