diff --git a/ApplicationCode/ProjectDataModel/Completions/RimSimWellFracture.cpp b/ApplicationCode/ProjectDataModel/Completions/RimSimWellFracture.cpp
index c30da5922c..d6f67a8d4b 100644
--- a/ApplicationCode/ProjectDataModel/Completions/RimSimWellFracture.cpp
+++ b/ApplicationCode/ProjectDataModel/Completions/RimSimWellFracture.cpp
@@ -360,9 +360,12 @@ QString RimSimWellFracture::createOneBasedIJKText() const
     size_t i,j,k;
     size_t anchorCellIdx = findAnchorEclipseCell(mainGrid);
     if (anchorCellIdx == cvf::UNDEFINED_SIZE_T) return "";
+    
+    size_t gridLocalCellIdx;
+    const RigGridBase* hostGrid = mainGrid->gridAndGridLocalIdxFromGlobalCellIdx(anchorCellIdx, &gridLocalCellIdx);
 
-    bool ok = mainGrid->ijkFromCellIndex(anchorCellIdx, &i, &j, &k);
+    bool ok = hostGrid->ijkFromCellIndex(gridLocalCellIdx, &i, &j, &k);
     if (!ok) return "";
 
-    return QString("[%1, %2, %3]").arg(i + 1).arg(j + 1).arg(k + 1);
+    return QString("Grid %1: [%2, %3, %4]").arg(QString::fromStdString(hostGrid->gridName())).arg(i + 1).arg(j + 1).arg(k + 1);
 }
diff --git a/ApplicationCode/ProjectDataModel/RimFaultInViewCollection.cpp b/ApplicationCode/ProjectDataModel/RimFaultInViewCollection.cpp
index 1c906bc74c..5bfafccde1 100644
--- a/ApplicationCode/ProjectDataModel/RimFaultInViewCollection.cpp
+++ b/ApplicationCode/ProjectDataModel/RimFaultInViewCollection.cpp
@@ -285,10 +285,8 @@ void RimFaultInViewCollection::syncronizeFaults()
             QString secondConnectionText;
             
             {
-                const RigCell& cell = mainGrid->globalCellArray()[nncConnections[i].m_c1GlobIdx];
-
-                RigGridBase* hostGrid = cell.hostGrid();
-                size_t gridLocalCellIndex = cell.gridLocalCellIndex();
+                size_t gridLocalCellIndex;
+                const RigGridBase* hostGrid = mainGrid->gridAndGridLocalIdxFromGlobalCellIdx(nncConnections[i].m_c1GlobIdx, &gridLocalCellIndex);
 
                 size_t i, j, k;
                 if (hostGrid->ijkFromCellIndex(gridLocalCellIndex, &i, &j, &k))
@@ -308,10 +306,8 @@ void RimFaultInViewCollection::syncronizeFaults()
             }
 
             {
-                const RigCell& cell = mainGrid->globalCellArray()[nncConnections[i].m_c2GlobIdx];
-
-                RigGridBase* hostGrid = cell.hostGrid();
-                size_t gridLocalCellIndex = cell.gridLocalCellIndex();
+                size_t gridLocalCellIndex;
+                const RigGridBase* hostGrid = mainGrid->gridAndGridLocalIdxFromGlobalCellIdx(nncConnections[i].m_c2GlobIdx, &gridLocalCellIndex);
 
                 size_t i, j, k;
                 if (hostGrid->ijkFromCellIndex(gridLocalCellIndex, &i, &j, &k))
diff --git a/ApplicationCode/ReservoirDataModel/Completions/RigCompletionDataGridCell.cpp b/ApplicationCode/ReservoirDataModel/Completions/RigCompletionDataGridCell.cpp
index ea48f8c42c..5e2c3a8c2a 100644
--- a/ApplicationCode/ReservoirDataModel/Completions/RigCompletionDataGridCell.cpp
+++ b/ApplicationCode/ReservoirDataModel/Completions/RigCompletionDataGridCell.cpp
@@ -33,12 +33,11 @@ RigCompletionDataGridCell::RigCompletionDataGridCell(size_t globalCellIndex, con
 {
     if (mainGrid)
     {
-        const RigCell& cell = mainGrid->globalCellArray()[globalCellIndex];
-        RigGridBase*   grid = cell.hostGrid();
+        size_t gridLocalCellIndex;
+        const RigGridBase* grid = mainGrid->gridAndGridLocalIdxFromGlobalCellIdx(globalCellIndex, &gridLocalCellIndex);
+        
         if (grid)
         {
-            size_t gridLocalCellIndex = cell.gridLocalCellIndex();
-
             size_t i = 0;
             size_t j = 0;
             size_t k = 0;
diff --git a/ApplicationCode/ReservoirDataModel/RigMainGrid.cpp b/ApplicationCode/ReservoirDataModel/RigMainGrid.cpp
index 5853a121a4..adcd09cd42 100644
--- a/ApplicationCode/ReservoirDataModel/RigMainGrid.cpp
+++ b/ApplicationCode/ReservoirDataModel/RigMainGrid.cpp
@@ -47,6 +47,33 @@ RigMainGrid::~RigMainGrid(void)
 {
 }
 
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+RigGridBase* RigMainGrid::gridAndGridLocalIdxFromGlobalCellIdx(size_t globalCellIdx, size_t* gridLocalCellIdx)
+{
+    CVF_ASSERT(globalCellIdx < m_cells.size());
+    RigCell& cell = m_cells[globalCellIdx];
+    RigGridBase* hostGrid = cell.hostGrid();
+    CVF_ASSERT(hostGrid);
+    *gridLocalCellIdx = cell.gridLocalCellIndex();
+    return hostGrid;
+}
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+const RigGridBase* RigMainGrid::gridAndGridLocalIdxFromGlobalCellIdx(size_t globalCellIdx, size_t* gridLocalCellIdx) const
+{
+    CVF_ASSERT(globalCellIdx < m_cells.size());
+    const RigCell& cell = m_cells[globalCellIdx];
+    const RigGridBase* hostGrid = cell.hostGrid();
+    CVF_ASSERT(hostGrid);
+    *gridLocalCellIdx = cell.gridLocalCellIndex();
+    return hostGrid;
+}
+
+
 //--------------------------------------------------------------------------------------------------
 /// 
 //--------------------------------------------------------------------------------------------------
@@ -313,8 +340,10 @@ void RigMainGrid::calculateFaults(const RigActiveCellInfo* activeCellInfo)
                 // Find neighbor cell
                 if (firstNO_FAULTFaceForCell) // To avoid doing this for every face, and only when detecting a NO_FAULT
                 {
-                    hostGrid = m_cells[gcIdx].hostGrid();
-                    hostGrid->ijkFromCellIndex(m_cells[gcIdx].gridLocalCellIndex(), &i,&j, &k);
+                    size_t gridLocalCellIndex;
+                    hostGrid = this->gridAndGridLocalIdxFromGlobalCellIdx(gcIdx, &gridLocalCellIndex);
+
+                    hostGrid->ijkFromCellIndex(gridLocalCellIndex, &i,&j, &k);
                     isCellActive = activeCellInfo->isActive(gcIdx);
 
                     firstNO_FAULTFaceForCell = false;
diff --git a/ApplicationCode/ReservoirDataModel/RigMainGrid.h b/ApplicationCode/ReservoirDataModel/RigMainGrid.h
index 2b5b1e431f..7e1fdb6098 100644
--- a/ApplicationCode/ReservoirDataModel/RigMainGrid.h
+++ b/ApplicationCode/ReservoirDataModel/RigMainGrid.h
@@ -51,6 +51,9 @@ public:
     std::vector<RigCell>&                   globalCellArray() {return m_cells;}
     const std::vector<RigCell>&             globalCellArray() const {return m_cells;}
 
+    RigGridBase*                            gridAndGridLocalIdxFromGlobalCellIdx(size_t globalCellIdx, size_t* gridLocalCellIdx);
+    const RigGridBase*                      gridAndGridLocalIdxFromGlobalCellIdx(size_t globalCellIdx, size_t* gridLocalCellIdx) const;
+
     const RigCell&                          cellByGridAndGridLocalCellIdx(size_t gridIdx, size_t gridLocalCellIdx) const;
     size_t                                  reservoirCellIndexByGridAndGridLocalCellIndex(size_t gridIdx, size_t gridLocalCellIdx) const;
 
diff --git a/ApplicationCode/UserInterface/RiuViewerCommands.cpp b/ApplicationCode/UserInterface/RiuViewerCommands.cpp
index 930316aebb..3f114e3962 100644
--- a/ApplicationCode/UserInterface/RiuViewerCommands.cpp
+++ b/ApplicationCode/UserInterface/RiuViewerCommands.cpp
@@ -853,11 +853,8 @@ void RiuViewerCommands::findCellAndGridIndex(const RivIntersectionSourceInfo* cr
         crossSectionSourceInfo->crossSection()->firstAncestorOrThisOfType(eclipseView);
 
         size_t globalCellIndex = crossSectionSourceInfo->triangleToCellIndex()[firstPartTriangleIndex];
-
-        const RigCell& cell = eclipseView->mainGrid()->globalCellArray()[globalCellIndex];
-
-        *cellIndex = cell.gridLocalCellIndex();
-        *gridIndex = cell.hostGrid()->gridIndex();
+        const RigGridBase* hostGrid = eclipseView->mainGrid()->gridAndGridLocalIdxFromGlobalCellIdx(globalCellIndex, cellIndex);
+        *gridIndex = hostGrid->gridIndex();
     }
     else if (geomCase)
     {