Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Whetherly16/SCD_Book49-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6968-SCD_Book49-V1.ps) >>/Users/jc/w/tmp/Tune-6968-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Whetherly16/SCD_Book49-V1.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-6968-SCD_Book49-V1.abc 157 ABC music file with the extracted tune(s)
Tune-6968-SCD_Book49-V1.ps 6 PostScript
Tune-6968-SCD_Book49-V1.txt 157 Plain-text file with the extracted tune(s)
Tune-6968-get.log 4167 Log file, useful mostly for debugging
Tune-69683-get.log 7114 Log file, useful mostly for debugging
Tune-69684-AndersonsBudgetV1.abc 158 ABC music file with the extracted tune(s)
Tune-69684-AndersonsBudgetV1.ps 6 PostScript
Tune-69684-AndersonsBudgetV1.txt 158 Plain-text file with the extracted tune(s)
Tune-69684-get.log 4283 Log file, useful mostly for debugging
Tune-69686-get.log 1638 Log file, useful mostly for debugging
Tune-69687-Straight_Skillern.abc 161 ABC music file with the extracted tune(s)
Tune-69687-Straight_Skillern.ps 6 PostScript
Tune-69687-Straight_Skillern.txt 161 Plain-text file with the extracted tune(s)
Tune-69687-get.log 9050 Log file, useful mostly for debugging
These files should be available for 24 hours.