Ignore empty simulations in sim table export

core/src/net/sf/openrocket/document/Simulation.java

@@ -459,7 +459,7 @@ public class Simulation implements ChangeSource, Cloneable {
 	/**
 	 * Return true if this simulation contains plottable flight data.
 	 * 
-	 * @return
+	 * @return true if this simulation contains plottable flight data.
 	 */
 	public boolean hasSimulationData() {
 		FlightData data = getSimulatedData();
@@ -472,6 +472,15 @@ public class Simulation implements ChangeSource, Cloneable {
 		return true;
 	}
 
+	/**
+	 * Return true if this simulation contains summary flight data.
+	 * @return true if this simulation contains summary flight data.
+	 */
+	public boolean hasSummaryData() {
+		FlightData data = getSimulatedData();
+		return data != null;
+	}
+	
 	/**
 	 * Returns a copy of this simulation suitable for cut/copy/paste operations.
 	 * The rocket refers to the same instance as the original simulation.

swing/src/net/sf/openrocket/file/SimulationTableCSVExport.java

@@ -118,6 +118,11 @@ public class SimulationTableCSVExport {
 			// Account for sorting... resulting CSV file will be in the same order as shown in the table thanks to this gem.
 			int idx = simulationTable.convertRowIndexToModel(i);
 
+			// Ignore empty simulation
+			if (!document.getSimulation(idx).hasSummaryData()) {
+				continue;
+			}
+
 			int nullCnt = 0;
 			rowColumnElement.clear();