diff --git a/ApplicationCode/FileInterface/RifEclipseOutputFileTools.cpp b/ApplicationCode/FileInterface/RifEclipseOutputFileTools.cpp
index 8d05154f7b..764736e624 100644
--- a/ApplicationCode/FileInterface/RifEclipseOutputFileTools.cpp
+++ b/ApplicationCode/FileInterface/RifEclipseOutputFileTools.cpp
@@ -123,7 +123,7 @@ void getDayMonthYear(const ecl_kw_type* intehead_kw, int* day, int* month, int*
 //--------------------------------------------------------------------------------------------------
 /// Get list of time step texts (dates)
 //--------------------------------------------------------------------------------------------------
-void RifEclipseOutputFileTools::timeSteps(ecl_file_type* ecl_file, std::vector<QDateTime>* timeSteps, std::vector<double>* daysSinceSimulationStart)
+void RifEclipseOutputFileTools::timeSteps(const ecl_file_type* ecl_file, std::vector<QDateTime>* timeSteps, std::vector<double>* daysSinceSimulationStart)
 {
     if (!ecl_file) return;
 
@@ -183,7 +183,7 @@ void RifEclipseOutputFileTools::timeSteps(ecl_file_type* ecl_file, std::vector<Q
 //--------------------------------------------------------------------------------------------------
 /// 
 //--------------------------------------------------------------------------------------------------
-bool RifEclipseOutputFileTools::keywordData(ecl_file_type* ecl_file, const QString& keyword, size_t fileKeywordOccurrence, std::vector<double>* values)
+bool RifEclipseOutputFileTools::keywordData(const ecl_file_type* ecl_file, const QString& keyword, size_t fileKeywordOccurrence, std::vector<double>* values)
 {
     bool result = false;
 
@@ -210,7 +210,7 @@ bool RifEclipseOutputFileTools::keywordData(ecl_file_type* ecl_file, const QStri
 //--------------------------------------------------------------------------------------------------
 /// 
 //--------------------------------------------------------------------------------------------------
-bool RifEclipseOutputFileTools::keywordData(ecl_file_type* ecl_file, const QString& keyword, size_t fileKeywordOccurrence, std::vector<int>* values)
+bool RifEclipseOutputFileTools::keywordData(const ecl_file_type* ecl_file, const QString& keyword, size_t fileKeywordOccurrence, std::vector<int>* values)
 {
     bool result = false;
 
@@ -365,7 +365,7 @@ void RifEclipseOutputFileTools::readGridDimensions(const QString& gridFileName,
 ///  3  : LAB
 ///  -1 : No INTEHEAD keyword found
 //--------------------------------------------------------------------------------------------------
-int RifEclipseOutputFileTools::readUnitsType(ecl_file_type* ecl_file)
+int RifEclipseOutputFileTools::readUnitsType(const ecl_file_type* ecl_file)
 {
     int unitsType = -1;
 
@@ -427,7 +427,7 @@ QString RifEclipseOutputFileTools::createIndexFileName(const QString& resultFile
 //--------------------------------------------------------------------------------------------------
 /// 
 //--------------------------------------------------------------------------------------------------
-std::set<RiaDefines::PhaseType> RifEclipseOutputFileTools::findAvailablePhases(ecl_file_type* ecl_file)
+std::set<RiaDefines::PhaseType> RifEclipseOutputFileTools::findAvailablePhases(const ecl_file_type* ecl_file)
 {
     std::set<RiaDefines::PhaseType> phaseTypes;
 
@@ -462,7 +462,7 @@ std::set<RiaDefines::PhaseType> RifEclipseOutputFileTools::findAvailablePhases(e
 /// 
 //--------------------------------------------------------------------------------------------------
 void RifEclipseOutputFileTools::transferNncFluxData(const ecl_grid_type* grid,
-                                                    ecl_file_view_type* summaryView,
+                                                    const ecl_file_view_type* summaryView,
                                                     std::vector<double>* waterFlux, 
                                                     std::vector<double>* oilFlux, 
                                                     std::vector<double>* gasFlux)
@@ -501,7 +501,7 @@ void RifEclipseOutputFileTools::transferNncFluxData(const ecl_grid_type* grid,
 //--------------------------------------------------------------------------------------------------
 /// 
 //--------------------------------------------------------------------------------------------------
-bool RifEclipseOutputFileTools::isExportedFromIntersect(ecl_file_type* ecl_file)
+bool RifEclipseOutputFileTools::isExportedFromIntersect(const ecl_file_type* ecl_file)
 {
     // This code is taken from ecl_file_get_ecl_version() in ecl_file.cpp
 
diff --git a/ApplicationCode/FileInterface/RifEclipseOutputFileTools.h b/ApplicationCode/FileInterface/RifEclipseOutputFileTools.h
index 0486cfd337..88e509ef07 100644
--- a/ApplicationCode/FileInterface/RifEclipseOutputFileTools.h
+++ b/ApplicationCode/FileInterface/RifEclipseOutputFileTools.h
@@ -51,10 +51,10 @@ public:
 
     static void         findKeywordsAndItemCount(std::vector<ecl_file_type*> ecl_files, QStringList* resultNames, std::vector<size_t>* resultDataItemCounts);
 
-    static bool         keywordData(ecl_file_type* ecl_file, const QString& keyword, size_t fileKeywordOccurrence, std::vector<double>* values);
-    static bool         keywordData(ecl_file_type* ecl_file, const QString& keyword, size_t fileKeywordOccurrence, std::vector<int>* values);
+    static bool         keywordData(const ecl_file_type* ecl_file, const QString& keyword, size_t fileKeywordOccurrence, std::vector<double>* values);
+    static bool         keywordData(const ecl_file_type* ecl_file, const QString& keyword, size_t fileKeywordOccurrence, std::vector<int>* values);
 
-    static void         timeSteps(ecl_file_type* ecl_file, std::vector<QDateTime>* timeSteps, std::vector<double>* daysSinceSimulationStart);
+    static void         timeSteps(const ecl_file_type* ecl_file, std::vector<QDateTime>* timeSteps, std::vector<double>* daysSinceSimulationStart);
 
     static bool         isValidEclipseFileName(const QString& fileName);
     static QByteArray   md5sum(const QString& fileName);
@@ -65,18 +65,18 @@ public:
 
     static void         readGridDimensions(const QString& gridFileName, std::vector< std::vector<int> >& gridDimensions);
 
-    static int          readUnitsType(ecl_file_type* ecl_file);
+    static int          readUnitsType(const ecl_file_type* ecl_file);
 
     static cvf::ref<RifEclipseRestartDataAccess> createDynamicResultAccess(const QString& fileName);
 
     static QString      createIndexFileName(const QString& resultFileName);
 
-    static std::set<RiaDefines::PhaseType> findAvailablePhases(ecl_file_type* ecl_file);
+    static std::set<RiaDefines::PhaseType> findAvailablePhases(const ecl_file_type* ecl_file);
 
-    static void         transferNncFluxData(const ecl_grid_type* grid, ecl_file_view_type* summaryView,
+    static void         transferNncFluxData(const ecl_grid_type* grid, const ecl_file_view_type* summaryView,
                                             std::vector<double>* waterFlux, std::vector<double>* oilFlux, std::vector<double>* gasFlux);
 
-    static bool         isExportedFromIntersect(ecl_file_type* ecl_file);
+    static bool         isExportedFromIntersect(const ecl_file_type* ecl_file);
 
     static ecl_kw_type* createActnumFromPorv(ecl_file_type* ecl_file);