Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Absent_Minded_Man/Straight_Skillern.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4102-Straight_Skillern.ps) >>/Users/jc/w/tmp/Tune-4102-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Absent_Minded_Man/Straight_Skillern.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_4102.log 266610 Log file, useful mostly for debugging
Coll_41024.log 447209 Log file, useful mostly for debugging
Coll_41028.log 465408 Log file, useful mostly for debugging
Tune-4102-Straight_Skillern.abc 167 ABC music file with the extracted tune(s)
Tune-4102-Straight_Skillern.ps 6 PostScript
Tune-4102-Straight_Skillern.txt 167 Plain-text file with the extracted tune(s)
Tune-4102-get.log 8196 Log file, useful mostly for debugging
Tune-41023-get.log 6858 Log file, useful mostly for debugging
Tune-41024-Kerr_MM1-V1.abc 147 ABC music file with the extracted tune(s)
Tune-41024-Kerr_MM1-V1.pdf 2217 Portable Data Format
Tune-41024-Kerr_MM1-V1.ps 6 PostScript
Tune-41024-Kerr_MM1-V1.txt 147 Plain-text file with the extracted tune(s)
Tune-41024-get.log 4931 Log file, useful mostly for debugging
Tune-41027-get.log 1428 Log file, useful mostly for debugging
These files should be available for 24 hours.