pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-73774-Loch_Erroch_Side-C-16-3.ps) >>/Users/jc/w/tmp/Tune-73774-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/session/march/Loch_Erroch_Side-C-16-3.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-73774-Loch_Erroch_Side-C-16-3.abc 554 ABC music file with the extracted tune(s)
Tune-73774-Loch_Erroch_Side-C-16-3.ps 36230 PostScript
Tune-73774-Loch_Erroch_Side-C-16-3.txt 554 Plain-text file with the extracted tune(s)
Tune-73774-get.log 4589 Log file, useful mostly for debugging
These files should be available for 24 hours.