pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-15961-OpenHymnal2011.ps) >>/Users/jc/w/tmp/Tune-15961-get.log 2>&1" returned status 256
http://openhymnal.org/OpenHymnal2011.10.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
Form_15961.log 905 Log file, useful mostly for debugging
Tune-15961-OpenHymnal2011.abc 3526 ABC music file with the extracted tune(s)
Tune-15961-OpenHymnal2011.ps 49453 PostScript
Tune-15961-OpenHymnal2011.txt 3526 Plain-text file with the extracted tune(s)
Tune-15961-get.log 87245 Log file, useful mostly for debugging
These files should be available for 24 hours.