Hi. I wonder whether the issue here may be the length of the
conditional build tag names here. Although there is no limit in the
number of characters that can be given to a tag, there is in the
conditional build statement you specifiy in your single source
layout. The limit is 255 characters INCLUDING your NOT/AND/OR
operands. If you have long tag names you'd be surprised how quickly
this 255 character limit gets used up.