Index: plugins/org.apache.karaf.eik.ui/src/main/java/org/apache/karaf/eik/ui/KarafLaunchConfigurationDelegate.java
===================================================================
--- plugins/org.apache.karaf.eik.ui/src/main/java/org/apache/karaf/eik/ui/KarafLaunchConfigurationDelegate.java	(revisione 1404165)
+++ plugins/org.apache.karaf.eik.ui/src/main/java/org/apache/karaf/eik/ui/KarafLaunchConfigurationDelegate.java	(copia locale)
@@ -398,7 +398,7 @@
          * org.osgi.framework.system.packages.extra property
          */
         final String extraSystemPackages = (String) equinoxProperties.get(OSGI_EXTRA_SYSTEM_PACKAGES_KEY);
-        if (extraSystemPackages.trim().isEmpty()) {
+        if (extraSystemPackages != null && extraSystemPackages.trim().isEmpty()) {
             equinoxProperties.remove(OSGI_EXTRA_SYSTEM_PACKAGES_KEY);
         }