Hello List, is it possible to check with avp_check() if a string is empty or not? I have tried to used something like that: avp_check( "$avp(s:test)", "eq//g" ); but this allways generates error when I start openser. $avp(s:test) is filled via a DB select with avp_db_select() and can be a empty string or not. I also tried is_avp_set() with the flag 'e', but this also didn't do the right thing. What does the flag 'e'? How this function determinate if a string is empty or not. Maybe I can change my DB value? Thanks in advance Jens