In further support of this general proposition that coram nobis lies only for facts dehors the record

The granting or denial of the writ is highly discretionary and only a clear abuse of discretion on the part of the trial court will prompt a reversal

Even if perjury were proven, this court has stated that the writ of coram nobis does not reach the question of perjury by a witness on a trial because the direct or implied finding by the jury or the court that the testimony of such witness was true is conclusive upon the hearing of the petition for the writ.

The writ of error coram nobis is a common law remedy and was an established part of Wisconsin criminal procedure before it was recognized in the statutes.

—matter of discretion; cannot go to merits-must be such as to prevent judgment, not throw it in doubt

Traditionally, coram nobis relief was not granted unless it appeared that a retrial would result in a different judgment

On an application for a writ of error coram nobis the merits of the original controversy are not in issue.

—in speaking of the writ of coram nobis at p. 839, the court said, "If such a remedy still exists, permission to file it will not be granted by an appellate court which has affirmed a conviction unless a meritorious showing is made."

[CITATION] Handbook of evidence for criminal trials