X:30 not found in http://andrewswaine.uk/sites/default/files/mytunes-v7.0.abc
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-13296-mytunes-v7.ps) >>/Users/jc/w/tmp/Tune-13296-get.log 2>&1" returned status 256
http://andrewswaine.uk/sites/default/files/mytunes-v7.0.abc

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Tune-13296-get.log 4403 Log file, useful mostly for debugging
Tune-13296-mytunes-v7.abc 0 ABC music file with the extracted tune(s)
Tune-13296-mytunes-v7.ps 6 PostScript
Tune-13296-mytunes-v7.txt 0 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.