diff --git a/main.inc.php b/main.inc.php
index ba5e464..724283c 100644
--- a/main.inc.php
+++ b/main.inc.php
@@ -1,7 +1,7 @@
 <?php
 /*
 Plugin Name: Exiftool GPS
-Version: 0.7
+Version: 0.7a
 Description: Uses command line exiftool to read exif GPS data. (Plugin based on Exiftool Keywords.)
 Plugin URI: http://piwigo.org/ext/extension_view.php?eid=850
 Author: ramack, plg
@@ -20,35 +20,40 @@ function eg_format_exif_data($exif, $filepath, $map)
   $output = shell_exec('exiftool -json "'.$filepath.'"');
   $metadata = json_decode($output, true);
 
-  foreach ($metadata as $key => $section) {
-    foreach ($section as $name => $val) {
-      if(substr( $name, 0, 3 ) === "GPS")
-      {
-        if($name === "GPSLatitude" or $name === "GPSLongitude")
-	{
-          /* convert to x/1 y/1 z/... format */
-          $p1 = explode("deg", $val);
-          $v1 = intval($p1[0]) . "/1";
-          $p2 = explode("'", $p1[1]);
-          $v2 = intval($p2[0]) . "/1";
-
-          $p3 = explode("\"", $p2[1]);
-          $v3 = intval($p3[0] * 10000) . "/10000";
-
-	  $exif[$name] = array($v1, $v2, $v3);
-	}
-        else if($name === "GPSLatitudeRef" or $name === "GPSLongitudeRef")
-	{
-          $exif[$name] = substr($val, 0, 1);
+  $exif = array();
+  if(is_array($metadata)) {
+    foreach ($metadata as $key => $section) {
+  	  if(!is_array($section)) {
+  		  continue;
+  	  }
+      foreach ($section as $name => $val) {
+        if(substr( $name, 0, 3 ) === "GPS")
+        {
+          if($name === "GPSLatitude" or $name === "GPSLongitude")
+          {
+            /* convert to x/1 y/1 z/... format */
+            $p1 = explode("deg", $val);
+            $v1 = intval($p1[0]) . "/1";
+            $p2 = explode("'", $p1[1]);
+            $v2 = intval($p2[0]) . "/1";
+  
+            $p3 = explode("\"", $p2[1]);
+            $v3 = intval($p3[0] * 10000) . "/10000";
+  
+  	        $exif[$name] = array($v1, $v2, $v3);
+  	      }
+          else if($name === "GPSLatitudeRef" or $name === "GPSLongitudeRef")
+  	      {
+            $exif[$name] = substr($val, 0, 1);
+          }
+          else
+          {
+            $exif[$name] = $val;
+          }
         }
-	else
-	{
-          $exif[$name] = $val;
-	}
       }
     }
   }
-
   return $exif;
 }
 ?>