pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5391-MayYarkersStrathspey1.ps) >>/Users/jc/w/tmp/Tune-5391-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/MayYarkersStrathspey1.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_5391.log 1338441 Log file, useful mostly for debugging
Coll_53914.log 659468 Log file, useful mostly for debugging
Coll_53915.log 281520 Log file, useful mostly for debugging
Tune-5391-MayYarkersStrathspey1.abc 2182 ABC music file with the extracted tune(s)
Tune-5391-MayYarkersStrathspey1.ps 58136 PostScript
Tune-5391-MayYarkersStrathspey1.txt 2182 Plain-text file with the extracted tune(s)
Tune-5391-get.log 5122 Log file, useful mostly for debugging
Tune-53918-O_Maria_G.abc 2151 ABC music file with the extracted tune(s)
Tune-53918-O_Maria_G.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-53918-O_Maria_G.ps 52190 PostScript
Tune-53918-O_Maria_G.txt 2151 Plain-text file with the extracted tune(s)
Tune-53918-get.log 5574 Log file, useful mostly for debugging
These files should be available for 24 hours.