activation of module dies

after enabling the module installation dies with a

Fatal error: Cannot redeclare ca_build_email_form() (previously declared in /sites/all/modules/ubercart/ca/ca.ca.inc:522) in sites/all/modules/uc_node_checkout_scheduler/uc_node_checkout_scheduler.ca.inc on line 331

around line 331 it says

/**
 * Builds an email settings form.
 */
function ca_build_email_form($form_state, $settings, $token_filters)

according to drupal naming conventions this function should be named

/**
 * Builds an email settings form.
 */
function uc_node_checkout_scheduler_build_email_form($form_state, $settings, $token_filters) 

changing this fixes the setup error

for the module to function as intended, you also have to change line 274f to:

// Email settings form
function uc_node_checkout_scheduler_action_unpublish_email_form($form_state, $settings = array()) {
  return uc_node_checkout_scheduler_build_email_form($form_state, $settings, array('global', 'user', 'node'));
}

...there you go :-)