MadMike

Hi, Made a small .ino, but I cannot reproduce my problem. Something about Eclipse+Sloeber, perhaps. Sob and sniff. Meanwhile, thanks for the suggestions from the respondents. I shall continue to try and solve the problem.

Thanks. I'll give the Arduino IDE a try. May take a few days.

Also the error I reported exists without running running setHandleProgramChange; the error occurs with just the presence of usb_midi_handleProgramChange = fptr. Almost as if the linker is putting this function in some wrong place.

1. usbMIDI.setHandleProgramChange(mProgramChange); mProgramChange points at a correct and present function. 2. extern void (*usb_midi_handleProgramChange)(uint8_t ch, uint8_t program); 3. if (usb_midi_handleProgramChange)...

Code snippet from usb_midi.h void setHandleProgramChange(void (*fptr)(uint8_t channel, uint8_t program)) { // type: 0xC0 ProgramChange // usb_midi_handleProgramChange = fptr; //zzz } if "usb_midi_handleProgramChange =...