Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/CNS/Tune-77617-one_note_samba.abc/tmp"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-998-tmp.ps) >>/Users/jc/w/tmp/Tune-998-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/CNS/Tune-77617-one_note_samba.abc/tmp

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-998-get.log 4049 Log file, useful mostly for debugging
Tune-998-tmp.abc 165 ABC music file with the extracted tune(s)
Tune-998-tmp.ps 6 PostScript
Tune-998-tmp.txt 165 Plain-text file with the extracted tune(s)
Tune-99809-GloryoftheWestThe_PLFD1651_028.abc 441 ABC music file with the extracted tune(s)
Tune-99809-GloryoftheWestThe_PLFD1651_028.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-99809-GloryoftheWestThe_PLFD1651_028.ps 33915 PostScript
Tune-99809-GloryoftheWestThe_PLFD1651_028.txt 441 Plain-text file with the extracted tune(s)
Tune-99809-get.log 5836 Log file, useful mostly for debugging
Tune-9981-get.log 4916 Log file, useful mostly for debugging
Tune-99816-get.log 4194 Log file, useful mostly for debugging
Tune-99827-get.log 10156 Log file, useful mostly for debugging
Tune-99829-31563_Cotillion_No_40_Yankee_Hills_Sett_tune_3.abc 1189 ABC music file with the extracted tune(s)
Tune-99829-31563_Cotillion_No_40_Yankee_Hills_Sett_tune_3.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-99829-31563_Cotillion_No_40_Yankee_Hills_Sett_tune_3.ps 37406 PostScript
Tune-99829-31563_Cotillion_No_40_Yankee_Hills_Sett_tune_3.txt 1189 Plain-text file with the extracted tune(s)
Tune-99829-get.log 6463 Log file, useful mostly for debugging
Tune-9983-get.log 5254 Log file, useful mostly for debugging
Tune-9984-get.log 3027 Log file, useful mostly for debugging
Tune-99841-get.log 4204 Log file, useful mostly for debugging
Tune-99843-get.log 1540 Log file, useful mostly for debugging
Tune-99849-get.log 4966 Log file, useful mostly for debugging
Tune-99849-reel.abc 167 ABC music file with the extracted tune(s)
Tune-99849-reel.pdf 2217 Portable Data Format
Tune-99849-reel.ps 6 PostScript
Tune-99849-reel.txt 167 Plain-text file with the extracted tune(s)
Tune-99859-get.log 4206 Log file, useful mostly for debugging
Tune-99863-31563_Cotillion_No_40_Yankee_Hills_Sett_tune_3.abc 1189 ABC music file with the extracted tune(s)
Tune-99863-31563_Cotillion_No_40_Yankee_Hills_Sett_tune_3.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-99863-31563_Cotillion_No_40_Yankee_Hills_Sett_tune_3.ps 37406 PostScript
Tune-99863-31563_Cotillion_No_40_Yankee_Hills_Sett_tune_3.txt 1189 Plain-text file with the extracted tune(s)
Tune-99863-get.log 6459 Log file, useful mostly for debugging
Tune-99870-get.log 4119 Log file, useful mostly for debugging
Tune-99892-get.log 3340 Log file, useful mostly for debugging
Tune-99892-tmp.abc 176 ABC music file with the extracted tune(s)
Tune-99892-tmp.txt 176 Plain-text file with the extracted tune(s)
Tune-99894-get.log 3886 Log file, useful mostly for debugging
Tune-99899-get.log 2870 Log file, useful mostly for debugging
These files should be available for 24 hours.