Compile error (solved) (2 replies)

After some months I changed some parameters and suddenly I end up with the following compile errors:

c:/users/mikew/.platformio/packages/toolchain-atmelavr/bin/../lib/gcc/avr/5.4.0/../../../../avr/bin/ld.exe: .pio\build\sanguino_atmega1284p\firmware.elf section `.text' will not fit in region `text'
c:/users/mikew/.platformio/packages/toolchain-atmelavr/bin/../lib/gcc/avr/5.4.0/../../../../avr/bin/ld.exe: region `text' overflowed by 10296 bytes
collect2.exe: error: ld returned 1 exit status
*** [.pio\build\sanguino_atmega1284p\firmware.elf] Error 1

What does that mean ?