diff --git a/prism/src/settings/NumericConstraint.java b/prism/src/settings/NumericConstraint.java
index e8afd6ed..0ceb908d 100644
--- a/prism/src/settings/NumericConstraint.java
+++ b/prism/src/settings/NumericConstraint.java
@@ -44,6 +44,10 @@ public abstract class NumericConstraint implements SettingConstraint
 		{
 			checkValueInteger(((Integer)value).intValue());
 		}
+		else if(value instanceof Long)
+		{
+			checkValueLong(((Long)value).longValue());
+		}
 		else
 		{
 			throw new SettingException("Invalid type for property, should be numeric.");
@@ -54,4 +58,5 @@ public abstract class NumericConstraint implements SettingConstraint
 	
 	public abstract void checkValueInteger(int value) throws SettingException;
 	
+	public abstract void checkValueLong(long value) throws SettingException;
 }
diff --git a/prism/src/settings/RangeConstraint.java b/prism/src/settings/RangeConstraint.java
index caa3613d..4fc0eeca 100644
--- a/prism/src/settings/RangeConstraint.java
+++ b/prism/src/settings/RangeConstraint.java
@@ -151,4 +151,24 @@ public class RangeConstraint extends NumericConstraint
 		}
 	}
 	
+	public void checkValueLong(long value) throws SettingException
+	{
+		if(inclusiveLower)
+		{
+			if(value < lower) throw new SettingException("The value: "+value+" should be >="+(long)lower);
+		}
+		else
+		{
+			if(value <= lower) throw new SettingException("The value: "+value+" should be >"+(long)lower);
+		}
+		
+		if(inclusiveUpper)
+		{
+			if(value > upper) throw new SettingException("The value: "+value+"should be <="+(long)upper);
+		}
+		else
+		{
+			if(value >= upper) throw new SettingException("The value: "+value+"should be <"+(long)upper);
+		}
+	}
 }
diff --git a/prism/src/userinterface/graph/AxisSettings.java b/prism/src/userinterface/graph/AxisSettings.java
index 64c61b21..eba92be3 100644
--- a/prism/src/userinterface/graph/AxisSettings.java
+++ b/prism/src/userinterface/graph/AxisSettings.java
@@ -146,11 +146,16 @@ public class AxisSettings extends Observable implements SettingOwner
 			{
 				if(activated && d >= maxValue.getDoubleValue()) throw new SettingException("Minimum value should be < Maximum value");
 			}
-			
-			public void checkValueInteger(int i) throws SettingException
-			{
-				if(activated && i >= maxValue.getDoubleValue()) throw new SettingException("Minimum value should be < Maximum value");
-			}
+			
+			public void checkValueInteger(int i) throws SettingException
+			{
+				if(activated && i >= maxValue.getDoubleValue()) throw new SettingException("Minimum value should be < Maximum value");
+			}
+			
+			public void checkValueLong(long i) throws SettingException
+			{
+				if(activated && i >= maxValue.getDoubleValue()) throw new SettingException("Minimum value should be < Maximum value");
+			}
 		});
 		maxValue.addConstraint(new NumericConstraint()
 		{
@@ -163,6 +168,11 @@ public class AxisSettings extends Observable implements SettingOwner
 			{
 				if(activated && i <= minValue.getDoubleValue()) throw new SettingException("Maximum value should be > Minimum value");
 			}
+			
+			public void checkValueLong(long i) throws SettingException
+			{
+				if(activated && i <= maxValue.getDoubleValue()) throw new SettingException("Minimum value should be > Maximum value");
+			}
 		});
 		minimumPower.addConstraint(new NumericConstraint()
 		{
@@ -170,11 +180,16 @@ public class AxisSettings extends Observable implements SettingOwner
 			{
 				if(activated && d >= maximumPower.getDoubleValue()) throw new SettingException("Minimum power should be < Maximum power");
 			}
-			
-			public void checkValueInteger(int i) throws SettingException
-			{
-				if(activated && i >= maximumPower.getDoubleValue()) throw new SettingException("Minimum power should be < Maximum power");
-			}
+			
+			public void checkValueInteger(int i) throws SettingException
+			{
+				if(activated && i >= maximumPower.getDoubleValue()) throw new SettingException("Minimum power should be < Maximum power");
+			}
+			
+			public void checkValueLong(long i) throws SettingException
+			{
+				if(activated && i >= maximumPower.getDoubleValue()) throw new SettingException("Minimum power should be < Maximum power");
+			}
 		});
 		maximumPower.addConstraint(new NumericConstraint()
 		{
@@ -182,8 +197,13 @@ public class AxisSettings extends Observable implements SettingOwner
 			{
 				if(activated && d <= minimumPower.getDoubleValue()) throw new SettingException("Maximum power should be > Minimum power");
 			}
+			
+			public void checkValueInteger(int i) throws SettingException
+			{
+				if(activated && i <= minimumPower.getDoubleValue()) throw new SettingException("Maximum power should be > Minimum power");
+			}
 			
-			public void checkValueInteger(int i) throws SettingException
+			public void checkValueLong(long i) throws SettingException
 			{
 				if(activated && i <= minimumPower.getDoubleValue()) throw new SettingException("Maximum power should be > Minimum power");
 			}