pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7270-Urbani_Liston_1800.ps) >>/Users/jc/w/tmp/Tune-7270-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Urbani_Liston/1800/Urbani_Liston_1800.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
Coll_72705.log 268169 Log file, useful mostly for debugging
Form_72701.log 745 Log file, useful mostly for debugging
Form_72704.log 777 Log file, useful mostly for debugging
Form_72705.log 738 Log file, useful mostly for debugging
Form_72707.log 744 Log file, useful mostly for debugging
Tune-7270-Urbani_Liston_1800.abc 0 ABC music file with the extracted tune(s)
Tune-7270-Urbani_Liston_1800.ps 0 PostScript
Tune-7270-Urbani_Liston_1800.txt 0 Plain-text file with the extracted tune(s)
Tune-7270-get.log 4081 Log file, useful mostly for debugging
Tune-72701-get.log 3217 Log file, useful mostly for debugging
Tune-72703-get.log 0 Log file, useful mostly for debugging
Tune-72706-get.log 1406 Log file, useful mostly for debugging
These files should be available for 24 hours.