On Vera in “Devices, Custom Z-wave settings, Configuration Settings” I tried to set a 1 byte dec to value “255” and got an immediate error from the webpage saying to input a 1 byte value. 254 works but not 255. I then changed the data size to 1 byte hex and it accepted “FF” with no error.
I sent in a tech support request on this. It is ticket #868. Tell tech support no need to reply to the ticket. I know they’re busy and I have a work-around.