pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-42018-bwreels-23.ps) >>/Users/jc/w/tmp/Tune-42018-get.log 2>&1" returned status 256
http://www.novasession.org/Bog Kit/Tunes/bwreels-23.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-42018-bwreels-23.abc 186 ABC music file with the extracted tune(s)
Tune-42018-bwreels-23.ps 32009 PostScript
Tune-42018-bwreels-23.txt 186 Plain-text file with the extracted tune(s)
Tune-42018-get.log 4739 Log file, useful mostly for debugging
These files should be available for 24 hours.