An application filed out of time without seeking condonation is a nullity and a 'non-event' that is not properly before the court and cannot be prosecuted. Such impropriety cannot be cured by a subsequent application for condonation because the original application was invalid from inception. Rule 449 allows correction only of errors or ambiguities attributable to the court, not to enable parties to obtain relief different from what they originally sought and motivated in their founding papers. Once a court grants an order in the precise terms sought by an applicant's draft order and founding affidavit, the court is functus officio and cannot revisit the application. Applications for dismissal for want of prosecution will be granted where: (1) the applicant has failed to prosecute the matter by filing required papers or setting down; (2) no reasonable explanation is provided for the delay; and (3) the interests of justice favor finality in litigation. Sheriff's sales in execution must be protected to preserve their efficacy, and courts will not condone procedural non-compliance where there is a pattern of abuse aimed at frustrating such sales. Costs on the higher scale are warranted where there is persistent abuse of court process, lack of probity and honesty, and wanton disregard for procedural rules.