diff --git a/c_runtime/simulation_result.cpp b/c_runtime/simulation_result.cpp
index e2c63b5b319..89d9902e14f 100644
--- a/c_runtime/simulation_result.cpp
+++ b/c_runtime/simulation_result.cpp
@@ -44,7 +44,9 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  * 2. Call emit() to store data points at given time (taken from globalData structure)
  * 3. Call deinitializeResult with actual number of points produced to store data to file.
  */
-
+ #include <stdio.h>
+ #include <errno.h>
+ #include <string.h>
  #include "simulation_result.h"
  #include "simulation_runtime.h"
  
@@ -135,14 +137,14 @@ int deinitializeResult(const char * filename)
   ofstream f(filename);
   if (!f)
   {
-    cerr << "Error, couldn't create output file " << filename << endl;
+    cerr << "Error, couldn't create output file: [" << filename << "] because" << strerror(errno) << "." << endl;
     return -1;
   }
 
   // Rather ugly numbers than unneccessary rounding.
   f.precision(numeric_limits<double>::digits10 + 1);
   f << "#Ptolemy Plot file, generated by OpenModelica" << endl;
-  f << "#IntervalSize=" << actualPoints<< endl;
+  f << "#IntervalSize=" << actualPoints << endl;
   f << "TitleText: OpenModelica simulation plot" << endl;
   f << "XLabel: t" << endl << endl;
 
diff --git a/c_runtime/solver_dasrt.cpp b/c_runtime/solver_dasrt.cpp
index c7c45dcba63..e0af3b2c6b3 100644
--- a/c_runtime/solver_dasrt.cpp
+++ b/c_runtime/solver_dasrt.cpp
@@ -324,14 +324,14 @@ int dassl_main(int argc, char**argv,double &start,  double &stop, double &step,
 
   deinitializeEventData();
 
-  string * result_file =(string*)getFlagValue("r",argc,argv);
-  const char * result_file_cstr;
+  string *result_file =(string*)getFlagValue("r",argc,argv);
+  string result_file_cstr;
   if (!result_file) {
-    result_file_cstr = string(string(globalData->modelName)+string("_res.plt")).c_str();
+    result_file_cstr = string(globalData->modelName)+string("_res.plt");
   } else {
-    result_file_cstr = result_file->c_str();
+    result_file_cstr = *result_file;
   }
- if (deinitializeResult(result_file_cstr)) {
+ if (deinitializeResult(result_file_cstr.c_str())) {
  	status =-1;
  }
   return status;
diff --git a/c_runtime/solver_euler.cpp b/c_runtime/solver_euler.cpp
index 45c34caf6e7..ac4935e965b 100644
--- a/c_runtime/solver_euler.cpp
+++ b/c_runtime/solver_euler.cpp
@@ -100,15 +100,14 @@ int euler_main( int argc, char** argv,double &start,  double &stop, double &step
     }
   } 
 
-
-  string * result_file =(string*)getFlagValue("r",argc,argv);
-  const char * result_file_cstr;
+  string* result_file =(string*)getFlagValue("r",argc,argv);
+  string result_file_cstr;
   if (!result_file) {
-    result_file_cstr = string(string(globalData->modelName)+string("_res.plt")).c_str();
+    result_file_cstr = string(globalData->modelName)+string("_res.plt");
   } else {
-    result_file_cstr = result_file->c_str();
+    result_file_cstr = *result_file;
   }
-  if (deinitializeResult(result_file_cstr)) {
+  if (deinitializeResult(result_file_cstr.c_str())) {
  	return -1;
  }
   return 0;