Hi Paul
Thanks - I have just tried your version 1.6, but still get the “File Not Exist” error when I try to save or load waveforms.
Ah - just realised it works if you now remove the SD card! - you are now presumably saving to the ARM memory.
I tried reading this from the USB, but I cannot see it because it is unformatted, even though my Mac reports the presence of the STM-32 mass storage. Any suggestions about how to transfer waveforms to my Mac? - I eventually want to print direct to a Polaroid POGO printer.
Tony