pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-71746-My_Uncle_Toby_1.ps) >>/Users/jc/w/tmp/Tune-71746-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Thompson/My_Uncle_Toby_1.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-71746-Landrin_Potpourri.abc 154 ABC music file with the extracted tune(s)
Tune-71746-Landrin_Potpourri.pdf 2217 Portable Data Format
Tune-71746-Landrin_Potpourri.ps 6 PostScript
Tune-71746-Landrin_Potpourri.txt 154 Plain-text file with the extracted tune(s)
Tune-71746-My_Uncle_Toby_1.abc 403 ABC music file with the extracted tune(s)
Tune-71746-My_Uncle_Toby_1.ps 32461 PostScript
Tune-71746-My_Uncle_Toby_1.txt 403 Plain-text file with the extracted tune(s)
Tune-71746-get.log 9639 Log file, useful mostly for debugging
These files should be available for 24 hours.