[jnojr]

$ mkisofs -o /cygdrive/c/Temp/test1.iso -R -J -D -v -d -N -no-emul-boot -boot-load-size 4 -boot-info-table -b isolinux/isolinux.bin -c isolinux/isolinux.boot
Warning: creating filesystem that does not conform to ISO-9660.
I: -input-charset not specified, using us-ascii (detected in locale settings)
genisoimage 1.1.7.1 (CYGWIN)
genisoimage: Missing pathspec.
Usage: genisoimage [options] -o file directory ...

Use genisoimage -help
to get a list of valid options.

Report problems to debburn-devel@lists.alioth.debian.org.

[jnojr]

For anyone else who runs into this... I didn't specify the root for the source Adding a '.' at the end got me rockin' and rollin'

[bigtomrodney]

Thanks for posting back your solution jnojr , always good to pay it forward