Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/cache/Button_Whitaker_SelectionOfDancesReelsAndWaltzes_1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7807-Button_Whitaker_SelectionOfDancesReelsAndWaltzes_1.ps) >>/Users/jc/w/tmp/Tune-7807-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/cache/Button_Whitaker_SelectionOfDancesReelsAndWaltzes_1.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Sess-78078.log 8497 Log file, useful mostly for debugging
Tune-7807-Button_Whitaker_SelectionOfDancesReelsAndWaltzes_1.abc 188 ABC music file with the extracted tune(s)
Tune-7807-Button_Whitaker_SelectionOfDancesReelsAndWaltzes_1.ps 6 PostScript
Tune-7807-Button_Whitaker_SelectionOfDancesReelsAndWaltzes_1.txt 188 Plain-text file with the extracted tune(s)
Tune-7807-get.log 4905 Log file, useful mostly for debugging
Tune-78071-get.log 12582 Log file, useful mostly for debugging
Tune-78072-get.log 138994 Log file, useful mostly for debugging
Tune-78074-get.log 2952 Log file, useful mostly for debugging
Tune-78076-get.log 2978 Log file, useful mostly for debugging
Tune-78077-31411_Cotillion_No_32_Isle_of_Shoals_Sett_tune_4-001.svg 30412 Scalable Vector Graphics format
Tune-78077-31411_Cotillion_No_32_Isle_of_Shoals_Sett_tune_4.abc 1091 ABC music file with the extracted tune(s)
Tune-78077-31411_Cotillion_No_32_Isle_of_Shoals_Sett_tune_4.txt 1091 Plain-text file with the extracted tune(s)
Tune-78077-get.log 5399 Log file, useful mostly for debugging
Tune-78078-get.log 3430 Log file, useful mostly for debugging
Tune-78079-get.log 8038 Log file, useful mostly for debugging
These files should be available for 24 hours.