pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-22847-2251_Light_and_Airy_Jigg.ps) >>/Users/jc/w/tmp/Tune-22847-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CSR/2251_Light_and_Airy_Jigg.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_22847.log 292760 Log file, useful mostly for debugging
Tune-22847-2251_Light_and_Airy_Jigg.abc 1109 ABC music file with the extracted tune(s)
Tune-22847-2251_Light_and_Airy_Jigg.ps 39160 PostScript
Tune-22847-2251_Light_and_Airy_Jigg.txt 1109 Plain-text file with the extracted tune(s)
Tune-22847-get.log 6126 Log file, useful mostly for debugging
These files should be available for 24 hours.