diff --git a/ScStwLibraries/headers/ScStw.hpp b/ScStwLibraries/headers/ScStw.hpp
index 341ac36..9306e46 100644
--- a/ScStwLibraries/headers/ScStw.hpp
+++ b/ScStwLibraries/headers/ScStw.hpp
@@ -129,6 +129,7 @@ public:
         RequiredParameterNotGivenError = 405,
         CurrentStateNotVaildForOperationError = 403,
         AccessDeniedError = 401,
+        NoSessionActiveError = 408,
 
         Error = 900,
         NotConnectedError = 910,