[3.6] Multiplied materials can't be removed.

[Liger0]

Application Version
3.6

Platform
Win10 x64

Printer
Any printer with 1.75mm diameter of the filament

Steps to Reproduce
Import the same meterial at least twice

Actual Results
There isn't any way to remove them afterwards

Expected results
They should be deleted easily

Additional Information
Video

[Ellecross]

Thanks for making the video!

I'm afraid that this has something to do with the customised Dual Extrusion CR-10 that you have back in #5064.

Hmmm... because, I tried with the same printers, CR-10 and CR-10s, then imported a custom material at least 3x. I can remove them successfully with no errors. I tried both on 3.6 and on 4.0 Beta. Can you please try adding one of these printers and confirm?

This is what I did:

1. Add CR-10 or CR-10s
2. Create a custom material
3. Export
4. (Optional) Reset configuration and add the same printer.
5. Import material again at least 2x
6. delete the material in Copyright Headers Missing #5.

I'm wondering now if maybe you are seeing a lot of this configuration errors because of that custom dual extrusion printer.

I have your ticket #5064 already pending for discussion with the team when they get back. ;) I'll relate this issue to that as well. I really think they are all related.

[Liger0]

I was trying it and now even with my custom printer that bug doesn't happen anymore, I am unsure why.
But trying this I had another problem showing up.
I created a meterial with a ender 3 machine, saved it, imported it again, then I switched the machine to a cr-10, and cura crashed.
I didn't touch my custom machine for this test.
Maybe it is possible using a someway wrong custom extruder definition, cura may crash even while not using it?

I understand that you people at ultimaker can't waste time if there are problems related to non-ultimaker machines though, so just in case anyone here that isn't from the UM team has spare time, I'll leave there the files I created to see if the error lies in anything there.

custom cr-10 definition and extruder.zip

[Ellecross]

Sorry I cannot help with the problem @Liger0. I still cannot reproduce the issue in this new scenario you mentioned.

but it's no problem with trying to help out one another. ;) We try to help out when we can - even if it's not an Ultimaker printer. Maybe @LipuFei you may know something about this when you get back from holiday?