The proviso to Order 6 Rule 17 CPC stipulates that no application for amendment shall be allowed after trial has commenced, unless the Court comes to the conclusion that, despite exercise of due diligence, the party could not raise the plea before commencement of trial. It is not in dispute that, in the present case, trial has commenced. The only question is whether the petitioner herein has shown due diligence in seeking amendment of the pleadings. In the affidavit filed in support of the I.A, the petitioner merely contended that, at the time of preparation of the written statement, there was a wrong mention in one of the paragraphs; the said mistakes were only typographical, and not wilful; and he would suffer irreparable loss and injury if the pleadings were not permitted to be amended. There is no whisper in the affidavit,