diff --git a/ApplicationLibCode/ProjectDataModel/Flow/RimWellAllocationPlot.cpp b/ApplicationLibCode/ProjectDataModel/Flow/RimWellAllocationPlot.cpp
index 877ee9cf6f..e9c331665a 100644
--- a/ApplicationLibCode/ProjectDataModel/Flow/RimWellAllocationPlot.cpp
+++ b/ApplicationLibCode/ProjectDataModel/Flow/RimWellAllocationPlot.cpp
@@ -439,8 +439,13 @@ void RimWellAllocationPlot::updateFromWell()
     QString wellStatusText = QString( "(%1)" ).arg( RimWellAllocationPlot::wellStatusTextForTimeStep( m_wellName, m_case, m_timeStep ) );
 
     QString flowTypeText = m_flowDiagSolution() ? "Well Allocation" : "Well Flow";
-    setDescription( flowTypeText + ": " + m_wellName + " " + wellStatusText + ", " + m_case->timeStepStrings()[m_timeStep] + " (" +
-                    m_case->caseUserDescription() + ")" );
+
+    // The stored time step can be out of range if the case has been replaced by a case with fewer time steps
+    const QStringList timeStepNames = m_case->timeStepStrings();
+    QString           timeStepText;
+    if ( m_timeStep() >= 0 && m_timeStep() < timeStepNames.size() ) timeStepText = timeStepNames[m_timeStep];
+
+    setDescription( flowTypeText + ": " + m_wellName + " " + wellStatusText + ", " + timeStepText + " (" + m_case->caseUserDescription() + ")" );
 
     /// Pie chart
 
diff --git a/ApplicationLibCode/ProjectDataModel/GridCrossPlots/RimGridCrossPlotDataSet.cpp b/ApplicationLibCode/ProjectDataModel/GridCrossPlots/RimGridCrossPlotDataSet.cpp
index 72c800c2cc..6b11a4853c 100644
--- a/ApplicationLibCode/ProjectDataModel/GridCrossPlots/RimGridCrossPlotDataSet.cpp
+++ b/ApplicationLibCode/ProjectDataModel/GridCrossPlots/RimGridCrossPlotDataSet.cpp
@@ -465,7 +465,11 @@ QString RimGridCrossPlotDataSet::timeStepString() const
             {
                 return "All Time Steps";
             }
-            return m_case->timeStepStrings()[m_timeStep];
+
+            // The stored time step can be out of range if the data set has been switched to a case with fewer time steps
+            const QStringList timeStepNames = m_case->timeStepStrings();
+            if ( m_timeStep() >= 0 && m_timeStep() < timeStepNames.size() ) return timeStepNames[m_timeStep];
+            return "";
         }
     }
     return "";
diff --git a/ApplicationLibCode/ProjectDataModel/Histogram/RimGridStatisticsHistogramDataSource.cpp b/ApplicationLibCode/ProjectDataModel/Histogram/RimGridStatisticsHistogramDataSource.cpp
index 8d2de24390..bd46fe1687 100644
--- a/ApplicationLibCode/ProjectDataModel/Histogram/RimGridStatisticsHistogramDataSource.cpp
+++ b/ApplicationLibCode/ProjectDataModel/Histogram/RimGridStatisticsHistogramDataSource.cpp
@@ -253,7 +253,10 @@ std::string RimGridStatisticsHistogramDataSource::name() const
         if ( m_case() && m_property->hasDynamicResult() )
         {
             if ( m_timeStep == -1 ) return "All Time Steps";
-            return m_case->timeStepStrings()[m_timeStep];
+
+            // The stored time step can be out of range if the case has been replaced by a case with fewer time steps
+            const QStringList timeStepNames = m_case->timeStepStrings();
+            if ( m_timeStep() >= 0 && m_timeStep() < timeStepNames.size() ) return timeStepNames[m_timeStep];
         }
 
         return "";