pscmd="(jcabc2ps /Users/jc/w/tmp/Tune-6035-AMHSI_abc1.abc -F fmt/pdf_70.fmt +s 0.70 +maxs 2000 )>/Users/jc/w/tmp/Tune-6035-AMHSI_abc1.ps 2>>/Users/jc/w/tmp/Tune-6035-get.log" returned status 35584.
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6035-AMHSI_abc1.ps) >>/Users/jc/w/tmp/Tune-6035-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/AMHSI_abc1.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_60350.log 462768 Log file, useful mostly for debugging
Coll_60351.log 639795 Log file, useful mostly for debugging
Coll_60352.log 490865 Log file, useful mostly for debugging
Form_60355.log 1005 Log file, useful mostly for debugging
Tune-6035-AMHSI_abc1.abc 144827 ABC music file with the extracted tune(s)
Tune-6035-AMHSI_abc1.ps 226812 PostScript
Tune-6035-AMHSI_abc1.txt 144827 Plain-text file with the extracted tune(s)
Tune-6035-get.log 122278 Log file, useful mostly for debugging
Tune-60354-Bourree_dite_Aurore_Sand_1.abc 391 ABC music file with the extracted tune(s)
Tune-60354-Bourree_dite_Aurore_Sand_1.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-60354-Bourree_dite_Aurore_Sand_1.ps 34138 PostScript
Tune-60354-Bourree_dite_Aurore_Sand_1.txt 391 Plain-text file with the extracted tune(s)
Tune-60354-get.log 39949 Log file, useful mostly for debugging
Tune-60357-get.log 3204 Log file, useful mostly for debugging
Tune-60358-get.log 4236 Log file, useful mostly for debugging
Tune-60359-get.log 3362 Log file, useful mostly for debugging
These files should be available for 24 hours.