3mf files not printing

I am unable to print *.3mf files on my P1P printer, even after downloading to the SD card from my laptop. Tried many of the 3D files, but no response from printer after pressing the print play.

You have to slice them with Bambu Studio

Only to be sure - you tried to print ‘sliced’ 3mf-files and not project 3mf-files (I know can be confusing)

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I sliced with Bambu Studio and saved to the SD card. It shows on the SD card ready to print. Pressed print and the play button keeps flashing

I opened the *.stl file in Bambu lab, then sliced it. It saved as *.3mf file on the SD card. The play button keeps flashing after entering print.

Got it. I opened under project 3mf and runs ok. Thank you