pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7009-1381_Brisk_Bob.ps) >>/Users/jc/w/tmp/Tune-7009-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CR/1381_Brisk_Bob.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_70090.log 1281880 Log file, useful mostly for debugging
Form_7009.log 873 Log file, useful mostly for debugging
Form_70090.log 1107 Log file, useful mostly for debugging
Form_70099.log 880 Log file, useful mostly for debugging
Tune-7009-1381_Brisk_Bob.abc 940 ABC music file with the extracted tune(s)
Tune-7009-1381_Brisk_Bob.ps 39953 PostScript
Tune-7009-1381_Brisk_Bob.txt 940 Plain-text file with the extracted tune(s)
Tune-7009-get.log 4483 Log file, useful mostly for debugging
Tune-70090-get.log 3341 Log file, useful mostly for debugging
Tune-70096-get.log 3999 Log file, useful mostly for debugging
Tune-70098-get.log 5655 Log file, useful mostly for debugging
These files should be available for 24 hours.