diff --git a/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/window/ZkReportViewer.java b/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/window/ZkReportViewer.java
index d514e7ae40..f8bff824d8 100644
--- a/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/window/ZkReportViewer.java
+++ b/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/window/ZkReportViewer.java
@@ -901,6 +901,8 @@ public class ZkReportViewer extends Window implements EventListener<Event>, IRep
 	}
 	
 	private void onPreviewReport() {
+		if(media == null)
+			return;
 		try {
 			mediaVersion++;
 			String url = Utils.getDynamicMediaURI(this, mediaVersion, media.getName(), media.getFormat());