PrusaSlicer and multi part prints

[jens55]

I have been struggling with this problem for a few days and was unable to resolve it on the PrusaSlicer community forum or the Discord channel. Scouring the corners of the internet did not give me an answer either. I am posting the question here in the hopes that maybe somebody has run into the same issue ....

I used to be able to drag a multi object 3mf file into PrusaSlicer and it would pop up a message box asking if the objects were all part of the same print (or something to that extent). When I now drag a 3mf file into the slicer, it recognizes the different bodies but no longer pops up the window asking me how to handle the bodies. It drops both bodies on the build plate which of course destroys all Z information.

I suspect I did something stupid but I have not been able to find the issue .....
The test object consists out of two parts and if I separate the parts out into individual stl files and then drag both files into PrusaSlicer at the same time, PS asks how to handle the two parts like it should but of course the Z information is already lost at that point.

What setting could convince PS to no longer ask me how to handle a multi part object while at the same time recognizing that multiple objects are involved in one file. What did I bugger up and how can I fix it?

The printer does not have the MMU option selected but instead it is set up for 4 tools.

[Exerqtor]

@jens55 I don't know for sure, but I'm quite certain the prompt/popup you're missing should come automatically when you insert more than one STL at a time in a printer setup with more than 1 tool. Try to unrar the 3mf file, and grab the stl's and drop all of them into PrusaSlicer at once. Rather than as 3mf file and see if it gets handeled differently.

[jens55]

@Exerqtor, yes, I also think it should happen automatically, everything I have read says this and it used to work that way but I have done stupid stuff with PrusaSlicer before and am thinking that I pulled another stupid move. As I indicated above, I did in fact take the two parts out of the 3mf and put them into separate STL files and when dragged into PS together, PS asks how to handle the two parts.

[jens55]

I finally managed to track down the problem. As it turns out, if I make two objects in fusion360 and save them in a 3mf file and then drag this file into PS, it asks what to do with the parts. If, on the other hand, I make one object in Fusion360 and then split it into two, PS thinks the two bodies are the same body and doesn't ask how to handle the parts.
At this point I do not know if it is a Fusion360 issue or if it is a PS issue.