pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7683-262_Spadill.ps) >>/Users/jc/w/tmp/Tune-7683-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1767/Thompson/262_Spadill.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_76833.log 282925 Log file, useful mostly for debugging
Coll_76834.log 1339611 Log file, useful mostly for debugging
Coll_76837.log 292760 Log file, useful mostly for debugging
Tune-7683-262_Spadill.abc 1047 ABC music file with the extracted tune(s)
Tune-7683-262_Spadill.ps 35093 PostScript
Tune-7683-262_Spadill.txt 1047 Plain-text file with the extracted tune(s)
Tune-7683-get.log 4468 Log file, useful mostly for debugging
Tune-76839-get.log 5009 Log file, useful mostly for debugging
These files should be available for 24 hours.