pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-544-all.ps) >>/Users/jc/w/tmp/Tune-544-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/SCD/Skye_HB/all.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_54425.log 47 Log file, useful mostly for debugging
Coll_54448.log 1085226 Log file, useful mostly for debugging
Coll_54466.log 259149 Log file, useful mostly for debugging
Find_54421.log 1537 Log file, useful mostly for debugging
Form_5443.log 833 Log file, useful mostly for debugging
Form_5445.log 824 Log file, useful mostly for debugging
Form_54492.log 885 Log file, useful mostly for debugging
Tune-544-all.abc 204 ABC music file with the extracted tune(s)
Tune-544-all.ps 33420 PostScript
Tune-544-all.txt 204 Plain-text file with the extracted tune(s)
Tune-544-get.log 4216 Log file, useful mostly for debugging
Tune-54403-get.log 3070 Log file, useful mostly for debugging
Tune-54410-get.log 37218 Log file, useful mostly for debugging
Tune-54439-get.log 2867 Log file, useful mostly for debugging
Tune-54460-get.log 3269 Log file, useful mostly for debugging
Tune-54477-get.log 4184 Log file, useful mostly for debugging
Tune-54487-get.log 1685 Log file, useful mostly for debugging
Tune-54499-get.log 3719 Log file, useful mostly for debugging
These files should be available for 24 hours.