Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/slide/Kohlers1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2628-Kohlers1.ps) >>/Users/jc/w/tmp/Tune-2628-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/slide/Kohlers1.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-2628-Kohlers1.abc 146 ABC music file with the extracted tune(s)
Tune-2628-Kohlers1.ps 6 PostScript
Tune-2628-Kohlers1.txt 146 Plain-text file with the extracted tune(s)
Tune-2628-get.log 4030 Log file, useful mostly for debugging
Tune-26280-24CountryDances_1762_Thompson.abc 166 ABC music file with the extracted tune(s)
Tune-26280-24CountryDances_1762_Thompson.ps 6 PostScript
Tune-26280-24CountryDances_1762_Thompson.txt 166 Plain-text file with the extracted tune(s)
Tune-26280-get.log 4390 Log file, useful mostly for debugging
Tune-26281-Wilson_Harmony_4NCD_1812_V1.abc 170 ABC music file with the extracted tune(s)
Tune-26281-Wilson_Harmony_4NCD_1812_V1.ps 6 PostScript
Tune-26281-Wilson_Harmony_4NCD_1812_V1.txt 170 Plain-text file with the extracted tune(s)
Tune-26281-get.log 4384 Log file, useful mostly for debugging
Tune-26286-get.log 1440 Log file, useful mostly for debugging
Tune-26289-WilliamShepherdsCollections.abc 170 ABC music file with the extracted tune(s)
Tune-26289-WilliamShepherdsCollections.pdf 2217 Portable Data Format
Tune-26289-WilliamShepherdsCollections.ps 6 PostScript
Tune-26289-WilliamShepherdsCollections.txt 170 Plain-text file with the extracted tune(s)
Tune-26289-get.log 5411 Log file, useful mostly for debugging
These files should be available for 24 hours.