Hi 

 i am configuring RADIUS accounting with openser and i facing the problem with radius_extra module in acc all other parameters are  ok but when i add $hdr something i got the following error.

 

parameters with avp are fine but problem is with $hdr.

 

modparam("acc", "radius_extra", ......; X-RTP-Stat=$hdr (X-RTP-Stat; ......)