[Solved] Internal error on command:"PREP" | ArmoredTurtle 3D | Page 1

pastel spoke Aug 28, 2025, 8:20 PM

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recently built BT kit im finally getting around to installing and cant seem to get past this error. if i comment out the prep section i can get past it. I checked my wiring so not sure if it could be a defective switch or something else

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solemn wharf Aug 28, 2025, 8:33 PM

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I had this problem because klipper was updated to the latest version. Once I downgraded versions that error went away.

https://klipper.discourse.group/t/internal-error-on-command-prep/24644/3

Klipper

Internal error on command:"PREP"

the command is used to PREP the Armored Box Turtle using an AFC-lite board with btt 2209’s System was working fine until update.

pastel spoke Aug 28, 2025, 9:12 PM

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that fixed it thank you

vapid sail Aug 28, 2025, 10:22 PM

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pastel spoke that fixed it thank you

If you run into the prep issue again after rolling back, then delete the AFC.var.unit file as this file might be empty and causes another error 😑 but it gets re-created

#[Solved] Internal error on command:"PREP"