diff --git a/Source/cmSystemTools.cxx b/Source/cmSystemTools.cxx
index 87a33a0c8..c36529bf0 100644
--- a/Source/cmSystemTools.cxx
+++ b/Source/cmSystemTools.cxx
@@ -469,11 +469,21 @@ bool cmSystemTools::RunSingleCommand(
         }
       }
     }
+  else if(cmsysProcess_GetState(cp) == cmsysProcess_State_Exception)
+    {
+    std::cerr << cmsysProcess_GetExceptionString(cp) << "\n";
+    result = false;
+    }
   else if(cmsysProcess_GetState(cp) == cmsysProcess_State_Error)
     {
     std::cerr << cmsysProcess_GetErrorString(cp) << "\n";
     result = false;
     }
+  else if(cmsysProcess_GetState(cp) == cmsysProcess_State_Expired)
+    {
+    std::cerr << "Process terminated due to timeout\n";
+    result = false;
+    }
   
   cmsysProcess_Delete(cp);