avrdude ur_initstruct() error: bootloader might be optiboot 6.2? Please use -xbootsize=<num>

[ednieuw]

When uploading to ATMEGA 1284P compiled with Arduino IDE 1 and IDE 2 I got his upload error. I use an FTDI connected to an PCB where the 1284P is on I have four PCB boards that uploaden fine in 2019-2020 but none at the moment.

I downgraded from 1.1.2 to 1.0.10 but got the same error.

Any idea what to do?

Sketch uses 30758 bytes (23%) of program storage space. Maximum is 130560 bytes.
Global variables use 3193 bytes (19%) of dynamic memory, leaving 13191 bytes for local variables. Maximum is 16384 bytes.
C:\Users\ednie\AppData\Local\Arduino15\packages\MightyCore\tools\avrdude\7.2-arduino.1/bin/avrdude -CC:\Users\ednie\AppData\Local\Arduino15\packages\MightyCore\hardware\avr\3.0.2/avrdude.conf -v -V -patmega1284p -curclock -PCOM19 -b115200 -D -xnometadata -Ueeprom:w:C:\Users\ednie\AppData\Local\Temp\arduino_build_219378/Character_Colour_Clock_V090.ino.eep:i -Uflash:w:C:\Users\ednie\AppData\Local\Temp\arduino_build_219378/Character_Colour_Clock_V090.ino.hex:i 

avrdude: Version 7.2-arduino.1
         Copyright the AVRDUDE authors;
         see https://github.com/avrdudes/avrdude/blob/main/AUTHORS

         System wide configuration file is C:\Users\ednie\AppData\Local\Arduino15\packages\MightyCore\hardware\avr\3.0.2\avrdude.conf

         Using Port                    : COM19
         Using Programmer              : urclock
         Overriding Baud Rate          : 115200
         AVR Part                      : ATmega1284P
         Chip Erase delay              : 55000 us
         PAGEL                         : PD7
         BS2                           : PA0
         RESET disposition             : possible i/o
         RETRY pulse                   : SCK
         Serial program mode           : yes
         Parallel program mode         : yes
         Timeout                       : 200
         StabDelay                     : 100
         CmdexeDelay                   : 25
         SyncLoops                     : 32
         PollIndex                     : 3
         PollValue                     : 0x53
         Memory Detail                 :

                                           Block Poll               Page                       Polled
           Memory Type Alias    Mode Delay Size  Indx Paged  Size   Size #Pages MinW  MaxW   ReadBack
           ----------- -------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
           eeprom                 65    10     8    0 no       4096    8      0  9000  9000 0x00 0x00
           flash                  65    10   128    0 yes    131072  256    512  4500  4500 0x00 0x00
           lfuse                   0     0     0    0 no          1    1      0  9000  9000 0x00 0x00
           hfuse                   0     0     0    0 no          1    1      0  9000  9000 0x00 0x00
           efuse                   0     0     0    0 no          1    1      0  9000  9000 0x00 0x00
           lock                    0     0     0    0 no          1    1      0  9000  9000 0x00 0x00
           signature               0     0     0    0 no          3    1      0     0     0 0x00 0x00
           calibration             0     0     0    0 no          1    1      0     0     0 0x00 0x00

         Programmer Type : Urclock
         Description     : Urclock programmer for urboot bootloaders using urprotocol
         Bootloader using STK500v1 communication protocol
avrdude: AVR device initialized and ready to accept instructions
avrdude ur_initstruct() error: bootloader might be optiboot 6.2? Please use -xbootsize=<num>

avrdude avr_signature() error: unable to read signature data for part ATmega1284P, rc=-1
avrdude main() error: unable to read signature data, rc=-1

avrdude done.  Thank you.

the selected serial port 
 does not exist or your board is not connected

[MCUdude]

You should probably update the bootloader that's on your board to Urboot, the bootloader MightyCore currently uses. If that's not an option, you'll have to downgrade to MightyCore v2.x

[ednieuw]

A downgrade to MightyCore v2.x was the solution. I just had to correct a few lines of code. Thanks for the quick reply.

[ednieuw]

Problem solved