EN
Login- Italiano
- Deutsch
- Polski
- Français
- Home
- Troubleshooting
- QR Error codes
- Invalid project #10521 (SL1/SL1S)
Invalid project #10521 (SL1/SL1S)
Menu
- Print Quality Troubleshooting
- QR Error codes
- A64 Overheat #10207 (SL1/SL1S)
- Ambient temperature too cold #10703 (SL1/SL1S)
- Ambient temperature too high #10702 (SL1/SL1S)
- An unexpected error has occurred #10701 (SL1)
- Another action is already running #10506 (SL1/SL1S)
- BBF Allocation Failed #17531 (XL)
- BBF Allocation Failed #26531 (MK4S) #13531 (MK4) #21531 (MK3.9) #23531 (MK3.5)
- BBF Initialization failed #17532 (XL)
- BBF Initialization Failed #26532 (MK4S) #13532 (MK4) #21532 (MK3.9) #23532 (MK3.5)
- Bed maxtemp error #26205 (MK4S) #13205 (MK4) #21205 (MK3.9) #23205 (MK3.5)
- Bed mintemp error #26207 (MK4S) #13207 (MK4) #21207 (MK3.9) #23207 (MK3.5)
- Bed preheat error #26201 (MK4S) #13201 (MK4) #21201 (MK3.9) #23201 (MK3.5)
- Bed thermal runaway #26203 (MK4S) #13203 (MK4) #21203 (MK3.9) #23203 (MK3.5)
- Boost board problem #10320 (SL1S)
- Boot slot changed #10601 (SL1/SL1S)
- Broken UV LED panel #10322 (SL1S)
- Calibration error #10113 (SL1/SL1S)
- Calibration load failed #10524 (SL1)
- Calibration project is invalid #10543 (SL1/SL1S)
- Can't copy project #10704 (SL1/SL1S)
- Cannot get update channel #10514 (SL1)
- Cannot read project #10539 (SL1/SL1S)
- Cannot remove project #10545 (SL1/SL1S)
- Cannot set update channel #10513 (SL1/SL1S)
- Cleaning adaptor missing #10125 (SL1/SL1S)
- Communication error #04402 (MMU)
- Connect Registration Failed
- Connect Registration Failed #12401 (MINI)
- Connect Registration Failed #17401 (XL)
- Connect Registration Failed #21401 (MK3.9)
- Connect Registration Failed #23401 (MK3.5)
- Connect Registration Failed #26401 (MK4S) #13401 (MK4)
- Connection failed #10403 (SL1/SL1S)
- Data overwrite failed #10530 (SL1/SL1S)
- Data preparation failure #10525 (SL1/SL1S)
- Disconnected UV LED panel #10321 (SL1/SL1S)
- Display test failed #10120 (SL1/SL1S)
- Display usage error #10535 (SL1)
- Dock position out of bounds #17103 (XL)
- Download failed #10404 (SL1/SL1S)
- Dwarf error #17502 (XL)
- Dwarf error #17503 (XL)
- EEPROM I2C Receive Busy #17316 (XL)
- EEPROM I2C Receive Busy #26316 (MK4S) #13316 (MK4) #21316 (MK3.9) #23316 (MK3.5)
- Emergency stop #12510 (MINI)
- Emergency stop #17510 (XL)
- Emergency stop #26510 (MK4S) #13510 (MK4) #21510 (MK3.9) #23510 (MK3.5)
- ESP error #17504 (XL)
- ESP error #17505 (XL)
- ESP error #17506 (XL)
- ESP Error #26504 (MK4S) #13504 (MK4) #21504 (MK3.9) #23504 (MK3.5)
- ESP Error #26505 (MK4S) #13505 (MK4) #21505 (MK3.9) #23505 (MK3.5)
- ESP Error #26506 (MK4S) #13506 (MK4) #21506 (MK3.9) #23506 (MK3.5)
- ESP not connected #17533 (XL)
- Extruder Maxtemp error #17206 (XL)
- Extruder Mintemp error #17208 (XL)
- Extruder not detected #20615 (MK4, MK4S)
- Extruder preheat error #17202 (XL)
- Extruder temp not matching #17210 (XL)
- Extruder thermal runaway #17204 (XL)
- Failed to read the configuration file #10505 (SL1)
- Fan failure #10106 (SL1/SL1S)
- Fan failure #10126 (SL1/SL1S)
- Fan RPM not in range #10122 (SL1/SL1S)
- Fan RPM out of test range #10127 (SL1/SL1S)
- Fan warning #10713 (SL1/SL1S)
- Filament already loaded #04501 (MMU)
- Filament change #04508 (MMU)
- Filament ejected #04507 (MMU)
- Filament sensor didn't trigger #04103 (MMU)
- Filament sensor too early #04106 (MMU)
- Filament sensor: Fil. stuck #04104 (MMU)
- File already exists! #10520 (SL1)
- File not found #10518 (SL1/SL1S)
- File system error #12613 (MINI/MINI+)
- File system error #26613 (MK4S) #13613 (MK4) #21613 (MK3.9) #23613 (MK3.5)
- FINDA didn't trigger #04101 (MMU)
- FINDA: Filament Stuck #04102 (MMU)
- Firmware in the internal flash corrupted! #12608 (MINI)
- Firmware missing #17612 (XL)
- Firmware runtime error #04505 (MMU)
- Firmware update failed #10534 (SL1)
- Firmware update needed #04504 (MMU)
- Firmware Update Required #26701 (MK4S) #13701 (MK4) #21701 (MK3.9) #23701 (MK3.5)
- Flash erase error #12605 (MINI/MINI+)
- Flash erase error #17605 (XL)
- Flash erase error #26605 (MK4S) #13605 (MK4) #21605 (MK3.9) #23605 (MK3.5)
- FW in internal flash corrupted #17608 (XL)
- FW in internal flash corrupted #26608 (MK4S) #13608 (MK4) #21608 (MK3.9) #23608 (MK3.5)
- Hash verification failed #12607 (MINI/MINI+)
- Hash verification failed #17607 (XL)
- Hash verification failed #26607 (MK4S) #13607 (MK4) #21607 (MK3.9) #23607 (MK3.5)
- Heatbed Port Overcurrent #26309 (MK4S) #13309 (MK4) #21309 (MK3.9) #23309 (MK3.5)
- Heatbed temp not matching #26209 (MK4S) #13209 (MK3.9/MK4) #23209 (MK3.5)
- Heatbreak Maxtemp error #17212 (XL)
- Heatbreak MAXTEMP Error #26212 (MK4S) #13212 (MK4) #21212 (MK3.9)
- Heatbreak Mintemp error #17211 (XL)
- Heatbreak MINTEMP Error #26211 (MK4S) #13211 (MK4) #21211 (MK3.9)
- Homing Error #12301 (MINI)
- Homing error X #12304 (MINI/MINI+)
- Homing error X #17304 (XL)
- Homing error X #26304 (MK4S) #13304 (MK4) #21304 (MK3.9) #23304 (MK3.5)
- Homing error Y #12305 (MINI/MINI+)
- Homing error Y #17305 (XL)
- Homing error Y #26305 (MK4S) #13305 (MK4) #21305 (MK3.9) #23305 (MK3.5)
- Homing error Z #17301 (XL)
- Homing Error Z #23301 (MK3.5)
- Homing error Z #26301 (MK4S) #13301 (MK4) #21301 (MK3.9)
- Hostname error #10536 (SL1/SL1S)
- Hotend Heater Overcurrent #17322
- Hotend maxtemp error #23206 (MK3.5)
- Hotend maxtemp error #26206 (MK4S) #13206 (MK4) #21206 (MK3.9)
- Hotend mintemp error #23208 (MK3.5)
- Hotend mintemp error #26208 (MK4S) #13208 (MK4) #21208 (MK3.9)
- Hotend preheat error #23202 (MK3.5)
- Hotend preheat error #26202 (MK4S) #13202 (MK4) #21202 (MK3.9)
- Hotend temp not matching #23210 (MK3.5)
- Hotend thermal runaway #23204 (MK3.5)
- Hotend thermal runaway #26204 (MK4S) #13204 (MK4) #21204 (MK3.9)
- I2C Receive failed #17315 (XL)
- I2C Receive Failed #26315 (MK4S) #13315 (MK4) #21315 (MK3.9) #23315 (MK3.5)
- I2C Receive Timeout #17317 (XL)
- I2C Receive Timeout #26317 (MK4S) #13317 (MK4) #21317 (MK3.9) #23317 (MK3.5)
- I2C Receive undefined #17318 (XL)
- I2C Receive undefined #26318 (MK4S) #13318 (MK4) #21318 (MK3.9) #23318 (MK3.5)
- I2C Send Busy #17312 (XL)
- I2C Send busy #26312 (MK4S) #13312 (MK4) #21312 (MK3.9) #23312 (MK3.5)
- I2C Send Failed #17311 (XL)
- I2C Send failed #26311 (MK4S) #13311 (MK4) #21311 (MK3.9) #23311 (MK3.5)
- I2C Send Timeout #17313 (XL)
- I2C Send Timeout #26313 (MK4S) #13313 (MK4) #21313 (MK3.9) #23313 (MK3.5)
- I2C Send Undefined #17314 (XL)
- I2C Send Undefined #26314 (MK4S) #13314 (MK4) #21314 (MK3.9) #23314 (MK3.5)
- Idler cannot home #04125 (MMU)
- Imposter! Fake signature #17606 (XL)
- Incorrect printer model #10705 (SL1/SL1S)
- Inspect FINDA #04107 (MMU)
- Internal error (DBUS mapping failed) #10507 (SL1/SL1S)
- Internal memory full #10516 (SL1/SL1S)
- Invalid API key #10405 (SL1/SL1S)
- Invalid file extension #10519 (SL1/SL1S)
- Invalid FW size on USB #12603 (MINI/MINI+)
- Invalid FW size on USB #26603 (MK4S) #13603 (MK4) #21603 (MK3.9) #23603 (MK3.5)
- Invalid FW size on USB flash drive #17603 (XL)
- Invalid project #10521 (SL1/SL1S)
- What happened?
- How to fix it?
- Invalid tilt align position #10121 (SL1/SL1S)
- Invalid tool #04502 (MMU)
- Language not set #10547 (SL1/SL1S)
- LED Memory Error #17529 (XL)
- LED Memory Error #26529 (MK4S) #13529 (MK4) #21529 (MK3.9) #23529 (MK3.5)
- Load to extruder failed #04108 (MMU)
- Loadcell Bad Configuration #17527 (XL)
- Loadcell Bad Configuration #26527 (MK4S) #13527 (MK4) #21527 (MK3.9)
- Loadcell measure failed #17526 (XL)
- Loadcell Measure Failed #26526 (MK4S) #13526 (MK4) #21526 (MK3.9)
- Loadcell not calibrated #17523 (XL)
- Loadcell Not Calibrated #26523 (MK4S) #13523 (MK4) #21523 (MK3.9)
- Loadcell tare error #17524 (XL)
- Loadcell Tare Error #26524 (MK4S) #13524 (MK4) #21524 (MK3.9)
- Loadcell tare failed #17525 (XL)
- Loadcell Tare Failed #26525 (MK4S) #13525 (MK4) #21525 (MK3.9)
- Loadcell timeout #17528 (XL)
- Loadcell Timeout #26528 (MK4S) #13528 (MK4) #21528 (MK3.9)
- Marlin Request Timeout #17530 (XL)
- Marlin Request Timeout #26530 (MK4S) #13530 (MK4) #21530 (MK3.9) #23530 (MK3.5)
- Mask noavail warning #10709 (SL1/SL1S)
- MCU Maxtemp Error #17213 (XL)
- Mintemp error bed #12207 (MINI)
- MMU MCU Error #04306 (MMU)
- MMU MCU Underpower #04307 (MMU)
- MMU not responding #04401 (MMU)
- MMU Overcurrent #26310 (MK4S) #13310 (MK4) #21310 (MK3.9) #23310 (MK3.5)
- MMU Selftest failed #04305 (MMU)
- MMU Selftest failed #04315 (MMU)
- MMU Selftest failed #04325 (MMU)
- Modular bed error #17250 (XL)
- Modular bed error #17251 (XL)
- Modular bed error #17252 (XL)
- Modular bed error #17253 (XL)
- Modular bed error #17254 (XL)
- Modular bed error #17255 (XL)
- Modular bed error #17256 (XL)
- Modular bed error #17257 (XL)
- Modular bed error #17302 (XL)
- Modular bed error #17303 (XL)
- Modular Bed Error #17319 (XL)
- Modular Bed Error #17320 (XL)
- Modular bed error #17501 (XL)
- No file on USB #12604 (MINI/MINI+)
- No file to reprint #10508 (SL1)
- No FW in internal flash #12612 (MINI/MINI+)
- No FW in internal flash #26612 (MK4S) #13612 (MK4) #21612 (MK3.9) #23612 (MK3.5)
- No FW on USB #26604 (MK4S) #13604 (MK4) #21604 (MK3.9) #23604 (MK3.5)
- No FW on USB flash drive #17604 (XL)
- No UV calibration data #10532 (SL1)
- Not connected to network #10402 (SL1/SL1S)
- Not enough layers #10540 (SL1/SL1S)
- Not enough resin #10706 (SL1/SL1S)
- Nozzle Heater Overcurrent #23308 (MK3.5)
- Nozzle Heater Overcurrent #26308 (MK4S) #13308 (MK4) #21308 (MK3.9)
- Object cropped warning #10710 (SL1/SL1S)
- Old Expo Panel #10548 (SL1/SL1S)
- Opening project failed #10504 (SL1/SL1S)
- Out of memory #17507 (XL)
- Out of Memory #26507 (MK4S) #13507 (MK4) #21507 (MK3.9) #23507 (MK3.5)
- Parameters out of range #10707 (SL1/SL1S)
- Pin not reached #17107 (XL)
- PNG Buffer Full #17508 (XL)
- PNG Buffer Full #26508 (MK4S) #13508 (MK4) #21508 (MK3.9) #23508 (MK3.5)
- Power Panic #17321 (XL)
- Power Panic #26321 (MK4S) #13321 (MK4) #21321 (MK3.9) #23321 (MK3.5)
- Precise Refinement Failed #17102 (XL)
- Print examples missing #10523 (SL1/SL1S)
- Printer is not UV calibrated #10308 (SL1)
- Printer Variant Mismatch #10711 (SL1/SL1S)
- Project analysis failed #10542 (SL1/SL1S)
- Project is corrupted #10541 (SL1/SL1S)
- Pulley cannot move #04105 (MMU)
- Puppy error #17511 (XL)
- Puppy error #17512 (XL)
- Puppy error #17513 (XL)
- Puppy error #17514 (XL)
- Puppy error #17515 (XL)
- Puppy error #17516 (XL)
- Puppy error #17517 (XL)
- Puppy error #17518 (XL)
- Puppy error #17519 (XL)
- Puppy error #17520 (XL)
- Puppy error #17521 (XL)
- Puppy error #17522 (XL)
- QR Error codes
- Queue full #04503 (MMU)
- Remote API error #10407 (SL1/SL1S)
- Resin low #10712 (SL1/SL1S)
- Resin measuring failed #10124 (SL1/SL1S)
- Resin sensor error #10307 (SL1/SL1S)
- Resin too high #10109 (SL1/SL1S)
- Resin too low #10108 (SL1/SL1S)
- Selector cannot home #04115 (MMU)
- Selector cannot move #04116 (MMU)
- Serial number error #10527 (SL1/SL1S)
- Signature verification failed #12606 (MINI/MINI+)
- Signature verification failed #26606 (MK4S) #13606 (MK4) #21606 (MK3.9) #23606 (MK3.5)
- Speaker test failed #10310 (SL1/SL1S)
- Stuck filament detection #26101 (MK4S) #13101 (MK4) #21101 (MK3.9) #17108 (XL)
- Temperature out of range #10208 (SL1/SL1S)
- Temperature out of range #10211 (SL1/SL1S)
- Temperature sensor failed #10205 (SL1/SL1S)
- Temperature sensor failed #10210 (SL1/SL1S)
- This Wizard cannot be canceled #10522 (SL1/SL1S)
- Tilt check failed #10119 (SL1/SL1S)
- Tilt endstop not reached #10115 (SL1/SL1S)
- Tilt homing failed #10101 (SL1/SL1S)
- Tilt moving failed #10104 (SL1/SL1S)
- TMC driver error #04301 (MMU)
- TMC driver error #04311 (MMU)
- TMC driver error #04321 (MMU)
- TMC Driver reset #04302 (MMU)
- TMC Driver reset #04312 (MMU)
- TMC Driver reset #04322 (MMU)
- TMC driver shorted #04304 (MMU)
- TMC driver shorted #04314 (MMU)
- TMC driver shorted #04324 (MMU)
- TMC overheat error #04202 (MMU)
- TMC overheat error #04212 (MMU)
- TMC overheat error #04222 (MMU)
- TMC Undervoltage error #04303 (MMU)
- TMC Undervoltage error #04313 (MMU)
- TMC Undervoltage error #04323 (MMU)
- Tool offset out of bounds #17104 (XL)
- Toolchanger error #17101 (XL)
- Tower check failed #10118 (SL1/SL1S)
- Tower endstop not reached #10114 (SL1/SL1S)
- Tower homing failed #10102 (SL1/SL1S)
- Tower moving failed #10103 (SL1/SL1S)
- Tower position error #10123 (SL1/SL1S)
- Unauthorized #10406 (SL1/SL1S)
- Unexpected error #10501 (SL1/SL1S)
- Unexpected MC error #10306 (SL1/SL1S)
- Unknown error #04900 (MMU)
- Unknown printer model #10323 (SL1/SL1S)
- Unload manually #04506 (MMU)
- Unsupported BBF version #12614 (MINI/MINI+)
- Unsupported BBF version #26614 (MK4S) #13614 (MK4) #21614 (MK3.9) #23614 (MK3.5)
- Unsupported Buddy FW #17611 (XL)
- Unsupported firmware BBF file #17614 (XL)
- Unsupported printer model #17610 (XL)
- Unsupported printer type #12610 (MINI/MINI+)
- Unsupported printer type #26610 (MK4S) #13610 (MK4) #21610 (MK3.9) #23610 (MK3.5)
- Unsupported printer version #12611 (MINI/MINI+)
- Unsupported printer version #26611 (MK4S) #13611 (MK4) #21611 (MK3.9) #23611 (MK3.5)
- USB Device Overcurrent #17307 (XL)
- USB Device Overcurrent #26307 (MK4S) #13307 (MK4) #21307 (MK3.9) #23307 (MK3.5)
- USB drive not detected #10528 (SL1/SL1S)
- USB flash drive not connected #17602 (XL)
- USB flash error #17613 (XL)
- USB not connected #12602 (MINI/MINI+)
- USB not connected #26602 (MK4S) #13602 (MK4) #21602 (MK3.9) #23602 (MK3.5)
- USB Port Overcurrent #17306 (XL)
- USB Port overcurrent #26306 (MK4S) #13306 (MK4) #21306 (MK3.9) #23306 (MK3.5)
- UV calibration error #10319 (SL1)
- UV data error #10533 (SL1)
- UV intensity too high #10317 (SL1/SL1S)
- UV intensity too low #10318 (SL1/SL1S)
- UV LED calibrator connection error #10312 (SL1)
- UV LED calibrator error #10314 (SL1)
- UV LED calibrator link error #10313 (SL1)
- UV LED calibrator not detected #10311 (SL1)
- UV LED calibrator readings error #10315 (SL1)
- UV LED heatsink overheating #10206 (SL1)
- UV LED temperature error #10209 (SL1/SL1S)
- UV led voltage error #10309 (SL1)
- Warning: TMC too hot #04201 (MMU)
- Warning: TMC too hot #04211 (MMU)
- Warning: TMC too hot #04221 (MMU)
- Wizard data failure #10526 (SL1/SL1S)
- Wrong printer model #10544 (SL1/SL1S)
- Wrong revision of motion controller #10301 (SL1)
- XY position invalid #17106 (XL)
- XY probe unstable #17105 (XL)
- Printer troubleshooting
- Print Error Messages
This article is also available in following languages: 
What happened?
The printer is displaying the message "The project file is invalid!"
Error name: Invalid project
Error code: #10521
This error is shown when the model chosen for printing is corrupted.
How to fix it?
Make sure you have the latest version of PrusaSlicer. Then, reslice the model and try the print again.
Was this article helpful?
Comments
Still have questions?
If you have a question about something that isn't covered here, check out our additional resources.
And if that doesn't do the trick, you can send an inquiry to [email protected] or through the button below.