pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2857-37_DA_LERWICK_LASSES.ps) >>/Users/jc/w/tmp/Tune-2857-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/HaandMeDoonDaFiddle/37_DA_LERWICK_LASSES.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_28570.log 468208 Log file, useful mostly for debugging
Coll_28572.log 268010 Log file, useful mostly for debugging
Coll_28574.log 363782 Log file, useful mostly for debugging
Coll_28577.log 1193228 Log file, useful mostly for debugging
Tune-2857-37_DA_LERWICK_LASSES.abc 789 ABC music file with the extracted tune(s)
Tune-2857-37_DA_LERWICK_LASSES.ps 34135 PostScript
Tune-2857-37_DA_LERWICK_LASSES.txt 789 Plain-text file with the extracted tune(s)
Tune-2857-Sligo_Air-G-16-2-001.svg 19027 Scalable Vector Graphics format
Tune-2857-Sligo_Air-G-16-2.abc 549 ABC music file with the extracted tune(s)
Tune-2857-Sligo_Air-G-16-2.txt 549 Plain-text file with the extracted tune(s)
Tune-2857-get.log 12191 Log file, useful mostly for debugging
Tune-28570-get.log 3931 Log file, useful mostly for debugging
Tune-28571-get.log 20712 Log file, useful mostly for debugging
Tune-28573-get.log 3153 Log file, useful mostly for debugging
Tune-28574-get.log 4587 Log file, useful mostly for debugging
These files should be available for 24 hours.