during testing I need to remove a Via header

This is the code snippet

route[REPLACE_VIA] {

    xlog ("L_INFO", "[REPLACE_VIA] Start of block\n");

    xlog ("L_INFO", "[REPLACE_VIA] $hdrc(Via) Via headers\n");

        if(remove_hf("Via")) {

                xlog ("L_INFO", "[REPLACE_VIA] removed Via\n");

        }

        else {

                xlog ("L_INFO", "[REPLACE_VIA] did not remove Via\n");

        }

    xlog ("L_INFO", "[REPLACE_VIA] $hdrc(Via) Via headers\n");

and this is the logs output

Sep  7 08:00:00 INFO: _LOG: 3a547f956d65fe985ba189916047fc320ae150ad: [REPLACE_RURI] Start of block

Sep  7 08:00:00 INFO: _LOG: 3a547f956d65fe985ba189916047fc320ae150ad: [REPLACE_VIA] Start of block

Sep  7 08:00:00 INFO: _LOG: 3a547f956d65fe985ba189916047fc320ae150ad: [REPLACE_VIA] 1 Via headers

Sep  7 08:00:00 INFO: _LOG: 3a547f956d65fe985ba189916047fc320ae150ad: [REPLACE_VIA] removed Via

Sep  7 08:00:00 INFO: _LOG: 3a547f956d65fe985ba189916047fc320ae150ad: [REPLACE_VIA] 1 Via headers

From the logs it looks like the remove_hf returns true and we have the header removed, but its still counting the Via header and the Via Header is still present when the INVIE is releyed on

 Regards,

Richard