pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3111-0793_MRS_GRAHAMS_REEL.ps) >>/Users/jc/w/tmp/Tune-3111-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/BostonCollection/0793_MRS_GRAHAMS_REEL.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Form_31116.log 821 Log file, useful mostly for debugging
List31110.log 162 Log file, useful mostly for debugging
Tune-3111-0793_MRS_GRAHAMS_REEL.abc 840 ABC music file with the extracted tune(s)
Tune-3111-0793_MRS_GRAHAMS_REEL.ps 37711 PostScript
Tune-3111-0793_MRS_GRAHAMS_REEL.txt 840 Plain-text file with the extracted tune(s)
Tune-3111-get.log 4775 Log file, useful mostly for debugging
These files should be available for 24 hours.