diff --git a/SeedDMS_Preview/Preview/Previewer.php b/SeedDMS_Preview/Preview/Previewer.php
index b993024c0..2532743e8 100644
--- a/SeedDMS_Preview/Preview/Previewer.php
+++ b/SeedDMS_Preview/Preview/Previewer.php
@@ -68,6 +68,39 @@ class SeedDMS_Preview_Previewer {
 		);
 	}
 
+	static function execWithTimeout($cmd, $timeout=2) { /* {{{ */
+		$descriptorspec = array(
+			0 => array("pipe", "r"),
+			1 => array("pipe", "w"),
+			2 => array("pipe", "w")
+		);
+		$pipes = array();
+	 
+	  $timeout += time();
+		$process = proc_open($cmd, $descriptorspec, $pipes);
+		if (!is_resource($process)) {
+			throw new Exception("proc_open failed on: " . $cmd);
+		}
+			 
+		$output = '';
+		do {
+			$timeleft = $timeout - time();
+			$read = array($pipes[1]);
+			stream_select($read, $write = NULL, $exeptions = NULL, $timeleft, NULL);
+					 
+			if (!empty($read)) {
+				$output .= fread($pipes[1], 8192);
+													}
+		} while (!feof($pipes[1]) && $timeleft > 0);
+ 
+		if ($timeleft <= 0) {
+			proc_terminate($process);
+			throw new Exception("command timeout on: " . $cmd);
+		} else {
+			return $output;
+		}
+	} /* }}} */
+
 	/**
 	 * Set a list of converters
 	 *
@@ -146,7 +179,11 @@ class SeedDMS_Preview_Previewer {
 			}
 			 */
 			if($cmd) {
-				exec($cmd);
+				//exec($cmd);
+				try {
+					self::execWithTimeout($cmd);
+				} catch(Exception $e) {
+				}
 			}
 			return true;
 		}
diff --git a/SeedDMS_Preview/package.xml b/SeedDMS_Preview/package.xml
index 123aa130e..2ce89a37d 100644
--- a/SeedDMS_Preview/package.xml
+++ b/SeedDMS_Preview/package.xml
@@ -11,8 +11,8 @@
   <email>uwe@steinmann.cx</email>
   <active>yes</active>
  </lead>
- <date>2015-02-13</date>
- <time>20:29:39</time>
+ <date>2015-08-08</date>
+ <time>09:36:57</time>
  <version>
   <release>1.1.4</release>
   <api>1.1.4</api>
@@ -23,7 +23,8 @@
  </stability>
  <license uri="http://opensource.org/licenses/gpl-license">GPL License</license>
  <notes>
-Converters to create preview images are no longer fixed. Those which has been hardcoded before remain the predefined converters, but they can also be changed.
+- Converters to create preview images are no longer fixed. Those which has been hardcoded before remain the predefined converters, but they can also be changed.
+- command for creating the preview will be called with a given timeout
  </notes>
  <contents>
   <dir baseinstalldir="SeedDMS" name="/">