pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4637-Cairdin_Ot_1.ps) >>/Users/jc/w/tmp/Tune-4637-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/abc/Scotland/reel/Cairdin_Ot_1.abc

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.65 512x512 PNG]
filesizedescription
Coll_46378.log 141597 Log file, useful mostly for debugging
Form_46371.log 839 Log file, useful mostly for debugging
Tune-4637-Cairdin_Ot_1.abc 583 ABC music file with the extracted tune(s)
Tune-4637-Cairdin_Ot_1.ps 38023 PostScript
Tune-4637-Cairdin_Ot_1.txt 583 Plain-text file with the extracted tune(s)
Tune-4637-get.log 9516 Log file, useful mostly for debugging
Tune-46372-get.log 1607 Log file, useful mostly for debugging
Tune-46376-get.log 1402 Log file, useful mostly for debugging
Tune-46377-get.log 3205 Log file, useful mostly for debugging
Tune-46379-get.log 1439 Log file, useful mostly for debugging
These files should be available for 24 hours.