Bambu lab slicer problem

[user_1656599482]

HI I’m having a strange problem - I’m making some keyrings and a sign for my Local Men’s Shed Charity
long keychain 40x100.3mf (2.0 MB)
SMS My Sign.3mf (154.2 KB)

• I have printed the keyrings a few weeks ago without any problem but now they just print in black ( the text and border should be white) I have noticed that although it all looks fine when slicing, the slider on the far right is not showing the colour change layer - I would be grateful if someone could help - I attach the 2 files (the files were created in maker world sign maker) I am using a BL X1-C with an AMS Black PETG HF in slot1 & White in Slot 2

[Lenyo]

Loads and slices OK for me, I see the change to white at layer 12:

[user_1656599482]

Hi Eric – thanks for the info – I just sliced it and it is still not showing the change layer – which is very strange as it printed fine a couple of weeks ago – I am beginning to suspect the last software update – sent the files to BL tech support and they are on the case