pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-27952-Julia_Cliffords_Slide.ps) >>/Users/jc/w/tmp/Tune-27952-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/CuzTeahan/SliabhLuachroOnParade/Julia_Cliffords_Slide.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_27952.log 450009 Log file, useful mostly for debugging
Form_27952.log 990 Log file, useful mostly for debugging
Tune-27952-Julia_Cliffords_Slide.abc 395 ABC music file with the extracted tune(s)
Tune-27952-Julia_Cliffords_Slide.ps 33964 PostScript
Tune-27952-Julia_Cliffords_Slide.txt 395 Plain-text file with the extracted tune(s)
Tune-27952-get.log 4881 Log file, useful mostly for debugging
These files should be available for 24 hours.