pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-40897-ABER_ACT.ps) >>/Users/jc/w/tmp/Tune-40897-get.log 2>&1" returned status 256
http://www.ibiblio.org/fiddlers/ABER_ACT.htm

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-40897-ABER_ACT.abc 532 ABC music file with the extracted tune(s)
Tune-40897-ABER_ACT.ps 36536 PostScript
Tune-40897-ABER_ACT.txt 532 Plain-text file with the extracted tune(s)
Tune-40897-get.log 4154 Log file, useful mostly for debugging
These files should be available for 24 hours.