pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-51306-MILLER.ps) >>/Users/jc/w/tmp/Tune-51306-get.log 2>&1" returned status 256
http://www.cpartington.plus.com/Links/Miller/MILLER(12-4-2016).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-51306-MILLER.abc 451 ABC music file with the extracted tune(s)
Tune-51306-MILLER.ps 35263 PostScript
Tune-51306-MILLER.txt 451 Plain-text file with the extracted tune(s)
Tune-51306-get.log 35559 Log file, useful mostly for debugging
These files should be available for 24 hours.