Pre-filling Rack randomly

Hello everyone.

I like to pre-fill a large warehouse with 10,000 pallets randomly upon model start-up. I have connected a source to generate all pallets at time 0 and the racks are all set to Place in Random Bay if Available and Place in Random Level if Available, as well as maximum 1 pallet/bay. The total capacity of all 18 racks is 13,050 pallets, so it is not full either.

It still places several pallets in the same cell overlaying each other and reaching into the ASRS aisle, which will look bad (see attached image).
I even tried letting all pallets enter individually every millisecond within the first 10 seconds, so each could check the cell availability, but the result is the same.
Am I overlooking any setting here?

Thanks for your help,
Kat

Is the max content of each of your Racks less than or equal to the number of cells in the rack (bays * levels)?

It seems to be working fine in my test to duplicate your problem. Can you post a sample model showing the problem?

Dear Phil,

yes I know it works in my other models as well, and I think it worked in this as well before.
Each of my racks has 72 bays with 10 levels = 720 positions plus 5 positions on cantilevers, total of 725 per rack and my queue is sending as round robin equally to all racks.
I remember there was an issue that the initial level location (in my case 1m) did not copy along when I was duplicating the bays, so I had to do this manually and then I wanted to copy it onto the other racks via Edit Selected Objects. Was not sure, which was the corresponding variable to copy, so I tried locationtable and sizetable. After that the racks went invisible when clicking on them, so I had to restart and try to rescue by editing through the model tree, maybe something got messed-up there?

I have no sample model, but could email you my current model to have a look? I would really like to avoid replacing all the racks and do all the placing and connections again.

Thanks,
Kat

Your racks with too many items in one bay have "Maximum items per cell" set to 2 in their Place in Bay code. Set that to 1 and it will behave as desired.

Thanks so much, you are right Phil, I had overlooked a few racks that still had the old setting! Now it looks beautiful :-)
Originally I wanted 2 per bay, but next to each other and not double-deep as per default. Then I decided before writing code of how to place them exactly, just to double the bays and place 1 each (though graphically the rack has too many columns then).
Is there an easy way to place 2 pallets next to each other in the same bay?

Thanks again,
Katharina

The easiest way to model the behavior you want is the way you are modeling it.