pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-68385-Bonnie_Lass_o_Bon_Accord_Am.ps) >>/Users/jc/w/tmp/Tune-68385-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Scotland/air/Bonnie_Lass_o_Bon_Accord_Am.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
Coll_68385.log 137362 Log file, useful mostly for debugging
Tune-68385-Bonnie_Lass_o_Bon_Accord_Am.abc 0 ABC music file with the extracted tune(s)
Tune-68385-Bonnie_Lass_o_Bon_Accord_Am.ps 0 PostScript
Tune-68385-Bonnie_Lass_o_Bon_Accord_Am.txt 0 Plain-text file with the extracted tune(s)
Tune-68385-get.log 0 Log file, useful mostly for debugging
These files should be available for 24 hours.