diff --git a/ApplicationCode/ProjectDataModel/RimSummaryCalculationVariable.cpp b/ApplicationCode/ProjectDataModel/RimSummaryCalculationVariable.cpp
index 051be7fd3f..c5f31f6842 100644
--- a/ApplicationCode/ProjectDataModel/RimSummaryCalculationVariable.cpp
+++ b/ApplicationCode/ProjectDataModel/RimSummaryCalculationVariable.cpp
@@ -18,8 +18,12 @@
 
 #include "RimSummaryCalculationVariable.h"
 
+#include "RiaApplication.h"
 #include "RiaSummaryCurveDefinition.h"
 
+#include "RifEclipseSummaryAddressQMetaType.h"
+
+#include "RimProject.h"
 #include "RimSummaryAddress.h"
 #include "RimSummaryCalculation.h"
 #include "RimSummaryCase.h"
@@ -86,7 +90,8 @@ void RimSummaryCalculationVariable::fieldChangedByUi(const caf::PdmFieldHandle*
         {
             RiuSummaryCurveDefSelectionDialog dlg(nullptr);
             dlg.hideEnsembles();
-            dlg.setCaseAndAddress(m_case(), m_summaryAddress->address());
+
+            readDataFromApplicationStore(&dlg);
 
             if (dlg.exec() == QDialog::Accepted)
             {
@@ -96,6 +101,8 @@ void RimSummaryCalculationVariable::fieldChangedByUi(const caf::PdmFieldHandle*
                     m_case = curveSelection[0].summaryCase();
                     m_summaryAddress->setAddress(curveSelection[0].summaryAddress());
 
+                    writeDataToApplicationStore();
+
                     updateContainingEditor = true;
                 }
             }
@@ -168,3 +175,48 @@ void RimSummaryCalculationVariable::defineObjectEditorAttribute(QString uiConfig
         attr->registerPushButtonTextForFieldKeyword(m_button.keyword(), "Edit");
     }
 }
+
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+void RimSummaryCalculationVariable::readDataFromApplicationStore(RiuSummaryCurveDefSelectionDialog* selectionDialog) const
+{
+    if (!selectionDialog) return;
+
+    auto sumCase    = m_case();
+    auto sumAddress = m_summaryAddress->address();
+    if (!sumCase && !sumAddress.isValid())
+    {
+        QVariant var = RiaApplication::instance()->cacheDataObject("CalculatorSummaryAddress");
+
+        auto lastUsedAddress = var.value<RifEclipseSummaryAddress>();
+        if (lastUsedAddress.isValid())
+        {
+            sumAddress = lastUsedAddress;
+        }
+        
+        QString lastUsedSummaryCaseString = RiaApplication::instance()->cacheDataObject("CalculatorSummaryCase").toString();
+
+        auto* lastUsedSummaryCase = dynamic_cast<RimSummaryCase*>(
+            caf::PdmReferenceHelper::objectFromReference(RiaApplication::instance()->project(), lastUsedSummaryCaseString));
+        if (lastUsedSummaryCase)
+        {
+            sumCase = lastUsedSummaryCase;
+        }
+    }
+
+    selectionDialog->setCaseAndAddress(sumCase, sumAddress);
+}
+
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+void RimSummaryCalculationVariable::writeDataToApplicationStore() const
+{
+    QString refFromProjectToObject =
+        caf::PdmReferenceHelper::referenceFromRootToObject(RiaApplication::instance()->project(), m_case);
+    RiaApplication::instance()->setCacheDataObject("CalculatorSummaryCase", refFromProjectToObject);
+
+    QVariant sumAdrVar = QVariant::fromValue(m_summaryAddress->address());
+    RiaApplication::instance()->setCacheDataObject("CalculatorSummaryAddress", sumAdrVar);
+}
diff --git a/ApplicationCode/ProjectDataModel/RimSummaryCalculationVariable.h b/ApplicationCode/ProjectDataModel/RimSummaryCalculationVariable.h
index be9b9c2967..baff8ada55 100644
--- a/ApplicationCode/ProjectDataModel/RimSummaryCalculationVariable.h
+++ b/ApplicationCode/ProjectDataModel/RimSummaryCalculationVariable.h
@@ -28,6 +28,7 @@
 
 class RimSummaryCase;
 class RimSummaryAddress;
+class RiuSummaryCurveDefSelectionDialog;
 
 //==================================================================================================
 ///  
@@ -53,6 +54,9 @@ private:
     virtual void defineUiOrdering(QString uiConfigName, caf::PdmUiOrdering& uiOrdering) override;
     virtual void defineObjectEditorAttribute(QString uiConfigName, caf::PdmUiEditorAttribute* attribute) override;
 
+    void readDataFromApplicationStore(RiuSummaryCurveDefSelectionDialog* selectionDialog) const;
+    void writeDataToApplicationStore() const;
+
 private:
     caf::PdmField<QString>                  m_name;
     caf::PdmProxyValueField<QString>        m_summaryAddressUi;