pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-15989-0101-Petronella-AL.ps) >>/Users/jc/w/tmp/Tune-15989-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/SCD/Book01/0101-Petronella-AL.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_15989.log 63644 Log file, useful mostly for debugging
Tune-15989-0101-Petronella-AL.abc 409 ABC music file with the extracted tune(s)
Tune-15989-0101-Petronella-AL.ps 36188 PostScript
Tune-15989-0101-Petronella-AL.txt 409 Plain-text file with the extracted tune(s)
Tune-15989-get.log 4351 Log file, useful mostly for debugging
These files should be available for 24 hours.