OK thanks. I set a new project name and loaded what is a working Pd patch titled _main.pd and clicked 'build and run' and got errors that I have no seen before:
PRU interrupt timeout, -1 110 Connection timed out
PRU interrupt timeout, -1 110 Connection timed out
PRU interrupt timeout, -1 110 Connection timed out
PRU interrupt timeout, -1 110 Connection timed out
McASP error, abort
PRU interrupt timeout, -1 110 Connection timed out
Makefile:613: recipe for target 'runide' failed
make: *** [runide] Error 1
Bela stopped
Can you shed any light? David