Undefined variable error message

Does anyone recognise this error message

Undefined variable: v in /home/mysite/public_html/media/com_easysocial/apps/fields/user/multidropdown/multidropdown.php on line 148

It is displayed in the my profile area of the dashboard .

Click on About and then it shows ( 3 times) at the top on one specific page of the profile. I'm guessing there is something wrong with one of the custom variables but as they all display correctly I'm wondering how I track it down.

The PHP code referenced is

if ($field->searchable) {

				$params = array( 'layout' => 'advanced' );

				$params['criterias[]'] = $field->unique_key . '|' . $field->element;

				$params['operators[]'] = 'contain';

				$params['conditions[]'] = $v;



				$advsearchLink = FRoute::search($params);

				$option->advancedsearchlink = $advsearchLink;

			}

Line 5 is error line