diff --git a/@BearImp/calcLub.m b/@BearImp/calcLub.m
index 0042a8cb1bbbf5ca3ad142788fdb996d6f0cb87e..5a99896a9dea7df14d3eb8813910941f9053b04c 100644
--- a/@BearImp/calcLub.m
+++ b/@BearImp/calcLub.m
@@ -26,7 +26,7 @@ switch T.method
         T.eta_0 = T.eta_00 + T.alpha_eta.*T_Oil;
         T.nu_38 = T.nu_0 + T.alpha_nu.*38;
     case 'Vogel'
-        %%% TODO: Was wenn Vogelparameter nicht gegeben? %%%
+        assert(~any(isnan([S.B S.C S.K])),'Vogel-Parameters not given for the selected lubricant. Choose method.T = ''linear''')
         T.eta_0 = S.K .* exp(S.B ./ (T_Oil + S.C));
         eta_38 = S.K .* exp(S.B ./ (40 + S.C));
         T.nu_38 = eta_38 ./ T.rho(38);