i forgot to put in whut is at the line it's asking for if this helps any
at line 255 is:
$master_query = tep_db_query("select products_id from " . TABLE_PRODUCTS . " where products_master = '" . (int)$HTTP_GET_VARS['products_id'] . " '");
$results = tep_db_fetch_array($master_query);
if (($results['products_id'] != null) && ($product_info['products_master_status'] == 1)) { ?>
<tr>
<td align="left" class="main"> <?php echo TEXT_SLAVE_PRODUCTS; ?></td>
</tr>
<tr>
<td><?php echo tep_draw_separator('pixel_trans.gif', '100%', '10'); ?></td>
</tr>
<tr>
<td><?php include(DIR_WS_MODULES . FILENAME_MASTER_PRODUCTS); ?></td>
</tr>