diff --git a/action.php b/action.php
index e0bc97d..44e750b 100644
--- a/action.php
+++ b/action.php
@@ -1,12 +1,14 @@
 <?php
+
+use dokuwiki\Cache\Cache;
+use dokuwiki\Extension\ActionPlugin;
+use dokuwiki\Extension\Event;
+use dokuwiki\Extension\EventHandler;
+use dokuwiki\StyleUtils;
+
 	/**
 		
 	*/
-	// must be run within Dokuwiki
-	if(!defined('DOKU_INC')) die();
-	
-	if(!defined('DOKU_PLUGIN')) define('DOKU_PLUGIN',DOKU_INC.'lib/plugins/');
-	require_once(DOKU_PLUGIN.'action.php');
 	
 	class action_plugin_epub extends DokuWiki_Action_Plugin {
 		private $helper;
@@ -101,7 +103,7 @@ function prevent_cache(&$event) {
              if(!$this->helper) {             
                 $this->helper = $this->loadHelper('epub', true);
             }          
-            if (!$this->helper->is_inCache($INFO['id']))  return;  //cache set in syntax.php 
+          if (isset($INFO['id']) && !$this->helper->is_inCache($INFO['id']))  return;  //cache set in syntax.php 
           $event->preventDefault();         
      }
      
diff --git a/plugin.info.txt b/plugin.info.txt
index 681541a..e5970ac 100644
--- a/plugin.info.txt
+++ b/plugin.info.txt
@@ -1,7 +1,7 @@
 base epub
 author Myron Turner
 email turnermm02@shaw.ca
-date 2022-10-05
+date 2023-01-31
 name epub
 desc Ebook creator 
 url http://www.dokuwiki.org/plugin:epub
diff --git a/renderer.php b/renderer.php
index 15bdff2..5c756ae 100644
--- a/renderer.php
+++ b/renderer.php
@@ -128,18 +128,18 @@ function _media ($src, $title=NULL, $align=NULL, $width=NULL,
                      $mpfile = str_replace('Audio/',"",$src);                            
                          $display_name = $title;
                          $title = $mpfile;                     
-                     $out .=  $this->_formatLink( array('class'=>'media mediafile mf_mp3','title'=>$title,'name'=>$title, 'display'=>$display_name) )  ."\n</div><p>";             
+                     $out .=  $this->_formatLink( array('class'=>'media mediafile mf_mp3','title'=>$title,'name'=>$title, 'display'=>$display_name, 'url'=>'') )  ."\n</div><p>";             
 			    }
 			}
          else if(strpos($mtype[1],'video') !== false)       {	
                      if($this->video_link)  $out .= '</p><div style="text-align:center">' ;//$out .= '<div style="text-align:center">' ;         
                 $out .= $this->set_video($src,$mtype,$title) ;   
                     if($this->video_link) {
-                          list($title,$rest) = explode('(', $title);
+                          list($title,$rest) = array_pad(explode('(', $title), 2, '');
                          $mpfile = str_replace('Video/',"",$src);                            
                          $display_name = $title;
                          $title = $mpfile;                     
-                         $out .=  $this->_formatLink( array('class'=>'media mediafile mf_mp4','title'=>$title,'name'=>$title, 'display'=>$display_name) )  ."\n</div><p>";             
+                         $out .=  $this->_formatLink( array('class'=>'media mediafile mf_mp4','title'=>$title,'name'=>$title, 'display'=>$display_name, 'url'=>'') )  ."\n</div><p>";             
                     }
          }
 			else {		 		 
@@ -180,7 +180,7 @@ function is_image($link,&$type) {
 			
 			$mime_type = mimetype($link['title']);
 			if(!$mime_type[1] ) {
-				list($url,$rest) = explode('?', $link['url']); 		                      
+				list($url,$rest) = array_pad(explode('?', $link['url']), 2,'');
 				$mime_type = mimetype($url);                
                 if(!$mime_type[1]) {
                     $mime_type = mimetype($rest);
@@ -333,7 +333,7 @@ function smiley($smiley) {
         function local_name($link,&$orig="", &$frag ="") {
             $base_name= basename($link['url']);
             $title = $link['title']? ltrim($link['title'],':'): "";
-            list($starturl,$frag) = explode('#',$link['url']);
+            list($starturl,$frag) = array_pad(explode('#',$link['url']), 2, '');
             if ($title) {
                 $name = $title;
             }  
diff --git a/scripts/css2.php b/scripts/css2.php
index 1c9b313..837018b 100644
--- a/scripts/css2.php
+++ b/scripts/css2.php
@@ -6,14 +6,11 @@
  * @author     Andreas Gohr <andi@splitbrain.org>
  */
 
-if(!defined('DOKU_INC')) define('DOKU_INC',realpath(dirname(__FILE__).'/../../../../').'/');	
-if(!defined('NOSESSION')) define('NOSESSION',true); // we do not use a session or authentication here (better caching)
-if(!defined('DOKU_DISABLE_GZIP_OUTPUT')) define('DOKU_DISABLE_GZIP_OUTPUT',1); // we gzip ourself here
-if(!defined('EPUB_DIR')) define('EPUB_DIR',realpath(dirname(__FILE__).'/../').'/');		
-if(!defined('DOKU_TPL')) define('DOKU_TPL', DOKU_BASE.'lib/tpl/'.$conf['template'].'/'); 
-if(!defined('DOKU_TPLINC')) define('DOKU_TPLINC', DOKU_INC.'lib/tpl/'.$conf['template'].'/');
-require_once(DOKU_INC.'inc/init.php');
-
+use dokuwiki\Cache\Cache;
+use dokuwiki\Extension\ActionPlugin;
+use dokuwiki\Extension\Event;
+use dokuwiki\Extension\EventHandler;
+use dokuwiki\StyleUtils;
 
 
 // ---------------------- functions ------------------------------
@@ -69,9 +66,9 @@ function epub_css_out($path){
      }
 
     // load user styles
-    if(isset($config_cascade['userstyle'][$mediatype])){
-        $files[$config_cascade['userstyle'][$mediatype]] = DOKU_BASE;
-    }
+    #if(isset($config_cascade['userstyle'][$mediatype])){
+    #    $files[$config_cascade['userstyle'][$mediatype]] = DOKU_BASE;
+    #}
  
     // load files
     $css = "";
diff --git a/scripts/epub_utils.php b/scripts/epub_utils.php
index da99f7b..c76a973 100644
--- a/scripts/epub_utils.php
+++ b/scripts/epub_utils.php
@@ -31,6 +31,7 @@ function epub_opf_header($user_title) {
                }
             }
            
+	    $cover_png = "";
            if(!$user_title) {			
                $cover_png='<item id="cover-image" href="Images/cover.png" media-type="image/png"/>'. "\n";
             }
@@ -616,7 +617,10 @@ function epub_save_namespace($ns="") {
         function epub_checkfor_ns($name, &$pages, &$titles) {
             $name = rtrim($name);
 
-            $n = strrpos($name,'*',-1);
+            $n = false;
+            if (strlen($n) > 0){
+                $n = strrpos($name,'*',-1);
+            }
             if(!$n) return;
              array_shift($pages);  // remove namespace id:  namespace:*
        
diff --git a/syntax.php b/syntax.php
index fcef3b3..2892b9f 100644
--- a/syntax.php
+++ b/syntax.php
@@ -1,8 +1,11 @@
 <?php
 	
-	if(!defined('DOKU_INC')) define('DOKU_INC',realpath(dirname(__FILE__).'/../../').'/');
-	if(!defined('DOKU_PLUGIN')) define('DOKU_PLUGIN',DOKU_INC.'lib/plugins/');
-	require_once(DOKU_PLUGIN.'syntax.php');
+use dokuwiki\Cache\Cache;
+use dokuwiki\Extension\ActionPlugin;
+use dokuwiki\Extension\Event;
+use dokuwiki\Extension\EventHandler;
+use dokuwiki\StyleUtils;
+
 	
 	
 	class syntax_plugin_epub extends DokuWiki_Syntax_Plugin {
@@ -83,7 +86,7 @@ function render($mode, Doku_Renderer $renderer, $data) {
 
 					for($i=0;$i<count($files);$i++) {					      
 	                    $file = trim($files[$i],'][');
-		                list($file,$rest) = explode('|',$file);	
+			        list($file,$rest) = array_pad(explode('|',$file), 2, '');
 						$file=trim($file);
 						$file=trim($file,'/');							 		
 						if(!$file) continue;				  
diff --git a/version b/version
index 60efa24..f9f0423 100644
--- a/version
+++ b/version
@@ -1,2 +1,2 @@
-master_22-Oct_05-09_43
+issue-#37-fix_23-Jan_31-15_36