Yes, I found that in version 2.9 of sm2uploader, preheating was cut out, since it is used for OrcaSlicer, where preheating has already been implemented into the program. I tried to use it with prusa, where there was no preheating integration yet, maybe that’s the problem. Thanks for the help. I solved the problem by completely switching to Orca, it’s good that it’s built on the basis of Prusa. OrcaSlicer Nightly Builds for Snapmaker Community - Dev Version