pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-86407-14051-Miss_Nancy_Frowns-1.ps) >>/Users/jc/w/tmp/Tune-86407-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/SCD/Book14/14051-Miss_Nancy_Frowns-1.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-86407-14051-Miss_Nancy_Frowns-1.abc 287 ABC music file with the extracted tune(s)
Tune-86407-14051-Miss_Nancy_Frowns-1.ps 33957 PostScript
Tune-86407-14051-Miss_Nancy_Frowns-1.txt 287 Plain-text file with the extracted tune(s)
Tune-86407-get.log 4667 Log file, useful mostly for debugging
These files should be available for 24 hours.