pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-92485-Det_Kimer.ps) >>/Users/jc/w/tmp/Tune-92485-get.log 2>&1" returned status 256
http://www.stephenmerrony.co.uk/ABC/Carols/D/Det_Kimer.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-92485-Det_Kimer.abc 388 ABC music file with the extracted tune(s)
Tune-92485-Det_Kimer.ps 6 PostScript
Tune-92485-Det_Kimer.txt 388 Plain-text file with the extracted tune(s)
Tune-92485-get.log 9120 Log file, useful mostly for debugging
These files should be available for 24 hours.