pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-94004-42051-May_Yarkers_Strathspey-1.ps) >>/Users/jc/w/tmp/Tune-94004-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/SCD/Book42/42051-May_Yarkers_Strathspey-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
Coll_94004.log 141597 Log file, useful mostly for debugging
Tune-94004-42051-May_Yarkers_Strathspey-1.abc 659 ABC music file with the extracted tune(s)
Tune-94004-42051-May_Yarkers_Strathspey-1.ps 40194 PostScript
Tune-94004-42051-May_Yarkers_Strathspey-1.txt 659 Plain-text file with the extracted tune(s)
Tune-94004-get.log 4959 Log file, useful mostly for debugging
These files should be available for 24 hours.