Edit tab is not working

I did the thing required, and the tabs are shown on the entity page

but when I click edit, it does not work, and I get this error message :
Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'egroups_edit_egroups_public_audience_form' not found or invalid function name in drupal_retrieve_form() (line 798 of /var/www/html/includes/form.inc).

the configuration in hook_entity_info() is:

'operations ui' => array(
// The base path for your entities. This is the same as your entity's URI
// but without the ID suffix. (In fact, you can set
// entity_operations_entity_uri() as your URI callback, which will use the
// value here).
'path' => 'egroups',
'operations' => array(
// The list of operations. The key defines the path component used after
// the entity ID.
// Creates the 'node/add' path.
'add' => array(
'handler' => 'EntityOperationsOperationAdd',
),
// Creates the path at 'node/NID/view'. Also shows at 'node/NID' because
// of the 'default' property.
'view' => array(
'handler' => 'EntityOperationsOperationEntityView',
'default' => TRUE,
),
// Creates the path at 'node/NID/edit'.
'edit' => array(
'handler' => 'EntityOperationsOperationEdit',
),
// If devel module is available, creates the path at 'node/NID/devel'.
'devel' => array(
'handler' => 'EntityOperationsOperationDevel',
),

'membership' => array(
'handler' => 'EntityOperationsOperationMembership',
),

),
),
'admin ui' => array(

'file' => 'egroups.admin.inc',
'controller class' => 'EGroupsUIController',
'menu wildcard' => '%egroups',
),

I don't know what is "file path"