pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8895-4243_Lord_McDonalds_Strathspey.ps) >>/Users/jc/w/tmp/Tune-8895-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CSR/4243_Lord_McDonalds_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_8895.log 444409 Log file, useful mostly for debugging
Coll_88950.log 452809 Log file, useful mostly for debugging
Coll_88951.log 443009 Log file, useful mostly for debugging
Coll_88952.log 272210 Log file, useful mostly for debugging
Coll_88956.log 877620 Log file, useful mostly for debugging
Coll_88958.log 879019 Log file, useful mostly for debugging
Form_88952.log 910 Log file, useful mostly for debugging
Tune-8895-4243_Lord_McDonalds_Strathspey.abc 1163 ABC music file with the extracted tune(s)
Tune-8895-4243_Lord_McDonalds_Strathspey.ps 40770 PostScript
Tune-8895-4243_Lord_McDonalds_Strathspey.txt 1163 Plain-text file with the extracted tune(s)
Tune-8895-get.log 5796 Log file, useful mostly for debugging
Tune-88954-get.log 4289 Log file, useful mostly for debugging
These files should be available for 24 hours.