X:9 not found in http://folkopedia.efdss.org/wiki/GB-6a-9.abc
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5174-GB-6a-9.ps) >>/Users/jc/w/tmp/Tune-5174-get.log 2>&1" returned status 256
http://folkopedia.efdss.org/wiki/GB-6a-9.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-5174-GB-6a-9.abc 0 ABC music file with the extracted tune(s)
Tune-5174-GB-6a-9.ps 0 PostScript
Tune-5174-get.log 0 Log file, useful mostly for debugging
These files should be available for 24 hours.