Index: trunk/autoquest-plugin-guitar/src/main/java/de/ugoe/cs/autoquest/plugin/guitar/commands/CMDefgTestCasesToSequences.java
===================================================================
--- trunk/autoquest-plugin-guitar/src/main/java/de/ugoe/cs/autoquest/plugin/guitar/commands/CMDefgTestCasesToSequences.java	(revision 1309)
+++ trunk/autoquest-plugin-guitar/src/main/java/de/ugoe/cs/autoquest/plugin/guitar/commands/CMDefgTestCasesToSequences.java	(revision 2232)
@@ -74,9 +74,13 @@
 			parser = new GUITARTestCaseParser(efgFileName);
 		}
-		for (File testcaseFile : testcaseFiles) {
-			Console.traceln(Level.INFO, "Loading from file "
-					+ testcaseFile.getAbsolutePath());
-			sequences.add(parser.parseTestCaseFile(testcaseFile));
+		
+		if (testcaseFiles != null) {
+			for (File testcaseFile : testcaseFiles) {
+				Console.traceln(Level.INFO, "Loading from file "
+						+ testcaseFile.getAbsolutePath());
+				sequences.add(parser.parseTestCaseFile(testcaseFile));
+			}
 		}
+		
 		if (GlobalDataContainer.getInstance().addData(sequencesName, sequences)) {
 			CommandHelpers.dataOverwritten(sequencesName);