Index: src/org/jboss/tools/smooks/configuration/editors/uitls/ProjectClassLoader.java
===================================================================
--- src/org/jboss/tools/smooks/configuration/editors/uitls/ProjectClassLoader.java	(revision 31143)
+++ src/org/jboss/tools/smooks/configuration/editors/uitls/ProjectClassLoader.java	(working copy)
@@ -77,17 +77,18 @@
 				.getLocation();
 		for (int i = 0; i < roots.length; i++) {
 			try {
-				if (roots[i].isArchive()) {
+				IPackageFragmentRoot iPackageFragmentRoot = roots[i];
+				if (iPackageFragmentRoot.isArchive()) {
 					File f = new File(FileLocator.resolve(
-							installPath.append(roots[i].getPath()).toFile()
+							installPath.append(iPackageFragmentRoot.getPath()).toFile()
 									.toURL()).getFile());
 					if (!f.exists()) {
 						f = new File(FileLocator.resolve(
-								roots[i].getPath().makeAbsolute().toFile()
+								iPackageFragmentRoot.getPath().makeAbsolute().toFile()
 										.toURL()).getFile());
 					}
 					if (!f.exists()) {
-						IJavaElement javaElement = roots[i].getPrimaryElement();
+						IJavaElement javaElement = iPackageFragmentRoot.getPrimaryElement();
 						String jarName = javaElement.getElementName();
 						IResource jarResource = project.getProject().findMember(jarName);
 
@@ -98,14 +99,14 @@
 
 					list.add(f.toURL());
 				} else {
-					IPath path = roots[i].getJavaProject().getOutputLocation();
+					IPath path = iPackageFragmentRoot.getJavaProject().getOutputLocation();
 					if (path.segmentCount() > 1) {
 						IWorkspaceRoot root = ResourcesPlugin.getWorkspace()
 								.getRoot();
 						path = root.getFolder(path).getLocation();
 						list.add(path.toFile().toURL());
 					} else {
-						path = roots[i].getJavaProject().getProject()
+						path = iPackageFragmentRoot.getJavaProject().getProject()
 								.getLocation();
 						list.add(path.toFile().toURL());
 					}
Index: src/org/jboss/tools/smooks/graphical/wizards/Messages.java
===================================================================
--- src/org/jboss/tools/smooks/graphical/wizards/Messages.java	(revision 31143)
+++ src/org/jboss/tools/smooks/graphical/wizards/Messages.java	(working copy)
@@ -8,6 +8,8 @@
 	public static String JavaBeanCreationWizardPage_27;
 	public static String JavaBeanCreationWizardPage_ArrayButtonText;
 	public static String JavaBeanCreationWizardPage_BeanClassEmptyErrorMessage;
+	public static String JavaBeanCreationWizardPage_UnsupportedClassVersionError;
+	public static String JavaBeanCreationWizardPage_ClassNotFoundException;
 	public static String JavaBeanCreationWizardPage_BeanClassLabel;
 	public static String JavaBeanCreationWizardPage_BeanIDDuplicateErrorMessage1;
 	public static String JavaBeanCreationWizardPage_BeanIDDuplicateErrorMessage2;
Index: src/org/jboss/tools/smooks/graphical/wizards/messages.properties
===================================================================
--- src/org/jboss/tools/smooks/graphical/wizards/messages.properties	(revision 31143)
+++ src/org/jboss/tools/smooks/graphical/wizards/messages.properties	(working copy)
@@ -2,6 +2,8 @@
 JavaBeanCreationWizardPage_27="
 JavaBeanCreationWizardPage_ArrayButtonText=Array
 JavaBeanCreationWizardPage_BeanClassEmptyErrorMessage=Java Class must be configured
+JavaBeanCreationWizardPage_UnsupportedClassVersionError=Class compile version not supported by Java Environment
+JavaBeanCreationWizardPage_ClassNotFoundException=Class not found on project Classpath
 JavaBeanCreationWizardPage_BeanClassLabel=Java Class :
 JavaBeanCreationWizardPage_BeanIDDuplicateErrorMessage1=Bean ID '
 JavaBeanCreationWizardPage_BeanIDDuplicateErrorMessage2=' is duplicate
Index: src/org/jboss/tools/smooks/graphical/wizards/JavaBeanCreationWizardPage.java
===================================================================
--- src/org/jboss/tools/smooks/graphical/wizards/JavaBeanCreationWizardPage.java	(revision 31143)
+++ src/org/jboss/tools/smooks/graphical/wizards/JavaBeanCreationWizardPage.java	(working copy)
@@ -439,6 +439,8 @@
 	}
 
 	protected void refreshJavaBeanModel() {
+		String error = null;
+		
 		if (beanClass == null || "".equals(beanClass.trim())) { //$NON-NLS-1$
 			viewer.setInput(""); //$NON-NLS-1$
 		} else {
@@ -471,8 +473,13 @@
 				viewer.setInput(""); //$NON-NLS-1$
 			} catch (ClassNotFoundException e1) {
 				viewer.setInput(""); //$NON-NLS-1$
+				error = Messages.JavaBeanCreationWizardPage_ClassNotFoundException;
+			} catch (UnsupportedClassVersionError classVersion) {
+				error = Messages.JavaBeanCreationWizardPage_UnsupportedClassVersionError;
 			}
 		}
+		this.setErrorMessage(error);
+		this.setPageComplete(error == null);
 	}
 
 	private void createBeanClassControls(Composite mainComposite) {