diff --git a/amdis/ProblemStat.inc.hpp b/amdis/ProblemStat.inc.hpp
index 5ff273351936481d62bf17d00785d5cef1f505dd..975e8cf4d0c95843ddfea4d9b7267399123a5846 100644
--- a/amdis/ProblemStat.inc.hpp
+++ b/amdis/ProblemStat.inc.hpp
@@ -26,10 +26,7 @@ void ProblemStat<Traits>::initialize(
     Flag adoptFlag)
 {
   // create grids
-  if (grid_) {
-    warning("grid already created");
-  }
-  else {
+  if (!grid_) {
     if (initFlag.isSet(CREATE_MESH) ||
         (!adoptFlag.isSet(INIT_MESH) &&
         (initFlag.isSet(INIT_SYSTEM) || initFlag.isSet(INIT_FE_SPACE)))) {
@@ -48,10 +45,7 @@ void ProblemStat<Traits>::initialize(
     warning("no grid created");
 
   // create fespace
-  if (globalBasis_) {
-    warning("globalBasis already created");
-  }
-  else {
+  if (!globalBasis_) {
     if (initFlag.isSet(INIT_FE_SPACE) ||
         (initFlag.isSet(INIT_SYSTEM) && !adoptFlag.isSet(INIT_FE_SPACE))) {
       createGlobalBasis();
@@ -79,10 +73,7 @@ void ProblemStat<Traits>::initialize(
 
 
   // create solver
-  if (linearSolver_) {
-    warning("solver already created\n");
-  }
-  else {
+  if (!linearSolver_) {
     if (initFlag.isSet(INIT_SOLVER))
       createSolver();
 
@@ -139,9 +130,7 @@ restore(Flag initFlag)
     createMatricesAndVectors();
 
   // create solver
-  if (linearSolver_)
-    warning("solver already created\n");
-  else if (initFlag.isSet(INIT_SOLVER))
+  if (!linearSolver_ && initFlag.isSet(INIT_SOLVER))
     createSolver();
 
   // create marker