Errors when a show is scheduled

Whenever the day/time reaches a point that a show is 'on air' three errors are displayed on every page with the 'now playing' block

Notice: Trying to get property of non-object in station_schedule_program_get_at() (line 936 of SiteURL/sites/all/modules/station/schedule/station_schedule.module).

Notice: Trying to get property of non-object in theme_station_block_current_program() (line 391 of SiteURL/sites/all/modules/station/station.module).

Notice: Undefined property: stdClass::$field_station_program_img_alt in theme_station_block_current_program() (line 391 of SiteURL/sites/all/modules/station/station.module).