diff --git a/META-INF/plugin.xml b/META-INF/plugin.xml
index 1c8e924..96076d6 100644
--- a/META-INF/plugin.xml
+++ b/META-INF/plugin.xml
@@ -1,7 +1,7 @@
 <idea-plugin version="2">
   <id>org.zkoss.zkidea</id>
   <name>ZK</name>
-  <version>0.1.8</version>
+  <version>0.1.9</version>
   <vendor email="info@zkoss.org" url="http://www.zkoss.org">ZK Framework</vendor>
   <depends>org.jetbrains.idea.maven</depends>
 
@@ -12,6 +12,11 @@
     ]]></description>
 
   <change-notes><![CDATA[
+      <p>0.1.9</p>
+      <ul>
+           <li> [bug] #19 - Exception on Intellij IU-163.12024.16 </li>
+      </ul>
+      <br>
       <p>0.1.8</p>
       <ul>
            <li> [bug] #14 - Worker exited due to exception </li>
diff --git a/src/org/zkoss/zkidea/project/ZKProjectsManager.java b/src/org/zkoss/zkidea/project/ZKProjectsManager.java
index 3b3647d..cec6494 100644
--- a/src/org/zkoss/zkidea/project/ZKProjectsManager.java
+++ b/src/org/zkoss/zkidea/project/ZKProjectsManager.java
@@ -139,7 +139,11 @@ public void run() {
 			LOG.info("Downloading latest zul file: " + ZulSchemaProvider.ZUL_PROJECT_SCHEMA_URL);
 
 			File fileTmp = new File(fileSrc.getAbsolutePath() + ".tmp");
-			FileUtil.writeToFile(fileTmp, download(new URL(ZulSchemaProvider.ZUL_PROJECT_SCHEMA_URL)));
+			byte[] download = download(
+					new URL(ZulSchemaProvider.ZUL_PROJECT_SCHEMA_URL));
+			if (download != null && download.length == 0)
+				return; // try next time.
+			FileUtil.writeToFile(fileTmp, download);
 //			HttpRequests.request(ZulSchemaProvider.ZUL_PROJECT_SCHEMA_URL).saveToFile(fileTmp, ProgressManager.getGlobalProgressIndicator());
 			double origin = getSchemaVersion(fileSrc);
 			double newone = getSchemaVersion(fileTmp);
@@ -154,6 +158,7 @@ public void run() {
 	private byte[] download(URL url) throws IOException {
 		URLConnection uc = url.openConnection();
 		int len = uc.getContentLength();
+		if (len < 0) return new byte[0];
 		InputStream is = new BufferedInputStream(uc.getInputStream());
 		try {
 			byte[] data = new byte[len];
@@ -189,7 +194,10 @@ private void updateMavenArchetype() {
 
 			File fileTmp = new File(fileSrc.getAbsolutePath() + ".tmp");
 
-			FileUtil.writeToFile(fileTmp, download(new URL(ZKMavenArchetypesProvider.MAVEN_ARCHETYPE_URL)));
+			byte[] download = download(new URL(ZKMavenArchetypesProvider.MAVEN_ARCHETYPE_URL));
+			if (download != null && download.length == 0)
+				return; // try next time.
+			FileUtil.writeToFile(fileTmp, download);
 //			HttpRequests.request(ZKMavenArchetypesProvider.MAVEN_ARCHETYPE_URL).saveToFile(fileTmp, ProgressManager.getGlobalProgressIndicator());
 
 			if (fileTmp.length() > fileSrc.length()) {