pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-81907-Hail_Ever_Hail_85.ps) >>/Users/jc/w/tmp/Tune-81907-get.log 2>&1" returned status 256
http://www.stephenmerrony.co.uk/ABC/Carols/H/Hail_Ever_Hail_85.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_81907.log 728 Log file, useful mostly for debugging
Tune-81907-Hail_Ever_Hail_85.abc 396 ABC music file with the extracted tune(s)
Tune-81907-Hail_Ever_Hail_85.ps 6 PostScript
Tune-81907-Hail_Ever_Hail_85.txt 396 Plain-text file with the extracted tune(s)
Tune-81907-get.log 4335 Log file, useful mostly for debugging
These files should be available for 24 hours.