pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-53660-637.ps) >>/Users/jc/w/tmp/Tune-53660-get.log 2>&1" returned status 256
http://www.thisoldtractor.com/guzzi007/Scottish_Tome/st_abc/637.0_Irish_Whispers.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-53660-637.abc 1217 ABC music file with the extracted tune(s)
Tune-53660-637.ps 44445 PostScript
Tune-53660-637.txt 1217 Plain-text file with the extracted tune(s)
Tune-53660-get.log 4445 Log file, useful mostly for debugging
These files should be available for 24 hours.