01220001:3: TCL error: wrong # args: should bewhile executing

I would guess the app is setting the LBSICAPRENDE cookie with no value. You could add logging to see what the value of the cookie is before using it. Or you could use catch to handle the error and log debug information if there is an error:

  
 if {[catch {persist add uie [HTTP::cookie "LBSICAPRENDE"]} result]}{  
     Error adding persistence record  
    log local0. "[IP::client_addr]:[TCP::client_port]:\ 
       Error on response from [IP::server_addr] with cookie [HTTP::cookie LBSICAPRENDE]. \$result: $result."  
 }  
 

Aaron