HTTP_RESPONSE not firing

Ah hah... Found it...

This rule was causing the errors...

when RULE_INIT {

set static::ErrorDebug 1

}


when HTTP_REQUEST priority 50 {

if {$static::ErrorDebug == 1} { log local0. "CatchErrors HTTP Request at Priority 50:" }

 Record request details encase needed later.
set HTTP_HOST [HTTP::host]
set HTTP_URI [HTTP::uri]
set HTTP_METHOD [HTTP::method]

set VSPool [LB::server pool]
if {$static::ErrorDebug == 1} { log local0. "\$HTTP_HOST = $HTTP_HOST, \$HTTP_URI = $HTTP_URI, \$HTTP_METHOD = $HTTP_METHOD, \$VSPool = $VSPool" }

if { [active_members $VSPool] < 1 } {
LB::detach
log local0. "Client [IP::client_addr] requested [HTTP::host][HTTP::uri] no active nodes available." 

 No pool members available. Setting error flag. 
set pool_error 1

}

}

when HTTP_RESPONSE priority 100 {

 Catch Bad Application Errors and set relevant error flag
if { $HTTP_METHOD == "GET" } {
if { [HTTP::status] == 404 or [HTTP::status] == 500 or [HTTP::status] == 502 or [HTTP::status] == 503 } {
log local0.info "Error encountered. Returning unavailable page. Request details: HTTP_HOST=$HTTP_HOST, HTTP_URI=$HTTP_URI, HTTP_METHOD=$HTTP_METHOD, VSPool=$VSPool, HTTP_Status=[HTTP::status]"
set response_error 1
return
}
}

}

Removed it from the VIP and it's now 100% success rate...

Now to try and work out why this rule would cause the issues i was seeing...

Gav