pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-50838-DerwentStr0.ps) >>/Users/jc/w/tmp/Tune-50838-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/DerwentStr0.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-50838-DerwentStr0.abc 775 ABC music file with the extracted tune(s)
Tune-50838-DerwentStr0.ps 36302 PostScript
Tune-50838-DerwentStr0.txt 775 Plain-text file with the extracted tune(s)
Tune-50838-ErevShelShoshanim.abc 1447 ABC music file with the extracted tune(s)
Tune-50838-ErevShelShoshanim.pdf 24940 Portable Data Format
Tune-50838-ErevShelShoshanim.ps 41243 PostScript
Tune-50838-ErevShelShoshanim.txt 1447 Plain-text file with the extracted tune(s)
Tune-50838-get.log 10713 Log file, useful mostly for debugging
These files should be available for 24 hours.