warning: Invalid argument supplied for foreach() in in URL "admin/ecsettings/location" - ecommerce

Hi

warning: Invalid argument supplied for foreach()

this is error i got from the url "admin/ecsettings/location" in section
Physical Dimensions

after some time of RnD

added modified some code... in the file store.admin.inc

  // Physical dimensions
  $measures = _store_location_measures();
 
<b>
  $weight= array();
  $volume= array();
  $length= array();
  $area= array();
  foreach($measures as $key=>$itm){
  	if ($itm['type'] == 'weight'){
		$weight[$key] = $itm['name'];
	}
	if ($itm['type'] == 'volume'){
		$volume[$key] = $itm['name'];
	}
	if ($itm['type'] == 'length'){
		$length[$key] = $itm['name'];
	}
	if ($itm['type'] == 'area'){
		$area[$key] = $itm['name'];
	}
  }
  </b>
  
  $form['dimensions'] = array(
    '#collapsible'    => TRUE,
    '#title'          => t('Physical Dimensions'),
    '#tree'           => FALSE,
    '#type'           => 'fieldset'
  );
  $form['dimensions']['ec_measure_weight'] = array(
    '#default_value'  => variable_get('ec_measure_weight', 'LB'),
    '#description'    => t('Default unit measure of weight.'),
    '#options'        => <b>$weight, //$measures['weight'],</b>
    '#title'          => t('Weight'),
    '#type'           => 'select'
  );
  $form['dimensions']['ec_measure_length'] = array(
    '#default_value'  => variable_get('ec_measure_length', 'IN'),
    '#description'    => t('Default unit measure of length.'),
    '#options'        => <b>$length, //$measures['length'],</b>
    '#title'          => t('Length'),
    '#type'           => 'select'
  );
  $form['dimensions']['ec_measure_area'] = array(
    '#default_value'  => variable_get('ec_measure_area', 'IN2'),
    '#description'    => t('Default unit measure of area.'),
    '#options'        => <b>$area, //$measures['area'],</b>
    '#title'          => t('Area'),
    '#type'           => 'select'
  );
  $form['dimensions']['ec_measure_volume'] = array(
    '#default_value'  => variable_get('ec_measure_volume', 'IN3'),
    '#description'    => t('Default unit measure of volume.'),
    '#options'        => <b>$volume, // $measures['volume'],</b>
    '#title'          => t('Volume'),
    '#type'           => 'select'
  );

Thanks
Vinoth