From 6e84525c9b8c0b3441f55c1cbe45593b04c82acd Mon Sep 17 00:00:00 2001
From: Dave Parker <dave.x.parker@gmail.com>
Date: Sun, 28 Jun 2015 08:41:13 +0000
Subject: [PATCH] Bug fix for label export refactoring in last commit.

git-svn-id: https://www.prismmodelchecker.org/svn/prism/prism/trunk@10115 bbc10eb1-c90d-0410-af57-cb519fbb1720
---
 prism/src/prism/Prism.java | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/prism/src/prism/Prism.java b/prism/src/prism/Prism.java
index 1a7b5cbe..76d958f0 100644
--- a/prism/src/prism/Prism.java
+++ b/prism/src/prism/Prism.java
@@ -3536,6 +3536,11 @@ public class Prism extends PrismComponent implements PrismSettingsListener
 	 */
 	private StateModelChecker createModelChecker(PropertiesFile propertiesFile) throws PrismException
 	{
+		// Create a dummy properties file if none exist
+		// (the symbolic model checkers rely on this to store e.g. model labels)
+		if (propertiesFile == null) {
+			propertiesFile = parsePropertiesString(currentModulesFile, "");
+		}
 		// Create model checker
 		StateModelChecker mc = StateModelChecker.createModelChecker(currentModelType, this, currentModel, propertiesFile);
 		// Pass any additional local settings