Error message

• Notice: Undefined offset: 324 in node_gallery_api_get_item_position() (line 825 of /home/ddebie/public_html/sites/all/modules/node_gallery/node_gallery_api.inc).
• Notice: Undefined offset: 324 in node_gallery_api_get_item_position() (line 825 of /home/ddebie/public_html/sites/all/modules/node_gallery/node_gallery_api.inc).
• Notice: Undefined offset: 324 in node_gallery_api_get_item_position() (line 825 of /home/ddebie/public_html/sites/all/modules/node_gallery/node_gallery_api.inc).