pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-16433-4183_Lady_Charlotte_Primrosess_Strathspey.ps) >>/Users/jc/w/tmp/Tune-16433-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CSR/4183_Lady_Charlotte_Primrosess_Strathspey.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_16433.log 886018 Log file, useful mostly for debugging
Tune-16433-4183_Lady_Charlotte_Primrosess_Strathspey.abc 993 ABC music file with the extracted tune(s)
Tune-16433-4183_Lady_Charlotte_Primrosess_Strathspey.ps 39347 PostScript
Tune-16433-4183_Lady_Charlotte_Primrosess_Strathspey.txt 993 Plain-text file with the extracted tune(s)
Tune-16433-get.log 5347 Log file, useful mostly for debugging
These files should be available for 24 hours.