#11258 Grid Calculation: Unintended release of result data memory

Avoid release of memory when working on a single case

ApplicationLibCode/ProjectDataModel/RimGridCalculation.cpp

@@ -609,10 +609,13 @@ std::vector<double> RimGridCalculation::getDataForResult( const QString&
         values[i] = resultAccessor->cellScalarGlobIdx( activeReservoirCells[i] );
     }
 
+    if ( m_releaseMemoryAfterDataIsExtracted )
+    {
         auto categoriesToExclude = { RiaDefines::ResultCatType::GENERATED };
 
         sourceCase->results( RiaDefines::PorosityModelType::MATRIX_MODEL )->freeAllocatedResultsData( categoriesToExclude, timeStepToUse );
         sourceCase->results( RiaDefines::PorosityModelType::FRACTURE_MODEL )->freeAllocatedResultsData( categoriesToExclude, timeStepToUse );
+    }
 
     return values;
 }
@@ -782,6 +785,9 @@ bool RimGridCalculation::calculateForCases( const std::vector<RimEclipseCase*>&
                                           m_expression().contains( "min" ) || m_expression().contains( "max" ) ||
                                           m_expression().contains( "count" );
 
+    // If multiple cases are present, release memory after data is extracted to avoid memory issues.
+    m_releaseMemoryAfterDataIsExtracted = isMultipleCasesPresent;
+
     if ( isMultipleCasesPresent )
     {
         QString txt = "Starting calculation '" + description() + "' for " + QString::number( calculationCases.size() ) + " cases.";

ApplicationLibCode/ProjectDataModel/RimGridCalculation.h

@@ -155,4 +155,6 @@ private:
     caf::PdmField<bool>                          m_editNonVisibleResultAddress;
 
     caf::PdmField<bool> m_applyToAllCases_OBSOLETE;
+
+    bool m_releaseMemoryAfterDataIsExtracted = false;
 };