pscmd="(jcabc2ps /Users/jc/w/tmp/Tune-23797-test1.abc -F fmt/pdf_70.fmt +s 0.70 +maxs 2000 )>/Users/jc/w/tmp/Tune-23797-test1.ps 2>>/Users/jc/w/tmp/Tune-23797-get.log" returned status 256.
http://roaringjelly.org/~jc/music/book/BostonCollection/test1.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 ]
filesizedescription
Tune-23797-CMCIT.abc 141 ABC music file with the extracted tune(s)
Tune-23797-CMCIT.ps 6 PostScript
Tune-23797-CMCIT.txt 141 Plain-text file with the extracted tune(s)
Tune-23797-get.log 8653 Log file, useful mostly for debugging
Tune-23797-test1.abc 7739 ABC music file with the extracted tune(s)
Tune-23797-test1.ps 30389 PostScript
Tune-23797-test1.txt 7739 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.