Appellants were convicted of robbery in May, 1946. The remittitur from this court was filed in the court below in May, 1947. In September, 1950, acting in propriis personis they filed their petition for a writ of error coram nobis or for writ of habeas corpus as an alternative remedy on the ground that they had been deprived of their *316 liberty without due process of law. The court below denied their pеtition for good reasons as will presently appear.
They argue that the proceedings had upon the information accusing them were void in that no order was made authоrizing an amendment to the pleading. There is not the faintest proof that any pleading other than the original information was filed. In truth, there is no showing of an error of any kind committed on thе trial or of any concealment of a fact relevant to the issues under investigation or of the failure of the prosecutor or the court to protect such rights as appellants had under the Constitutions and laws. He who assigns prejudicial error of the trial court must affirmatively establish such error in order to gain any advantage therefrom.
(People
v.
Russell,
Appellants declared in their application for the writ that no information was filed accusing them of being “habitual criminals,” under section 644 of the Penal Code. That section was not designed to create a new type of crime or any crime.
(In re McVickers,
Section 644,
supra,
does not place an accused person with prior convictions in jeopardy by reason of such former con
*317
viction; neither is it an
ex post facto
law.
(People
v.
Rosencrantz,
Appellants contend that their prior convictions were prejudicially alleged against them because they had not been legally discharged after such prior convictions and “are still under sentence thereunder.” Section 644 makes no requirement that one accused of a felony must either be in рrison or have completed his term to constitute a “prior conviction.” To warrant a person’s conviction as an habitual criminal under the statute besides the accusatory clause the indictment must allege that he has been previously twice convicted upon charges separately brought and tried, that he has served separate terms in а state or federal prison for any of the crimes listed. Such allegation and proof may be made even though the accused has been pardoned
(People
v.
Biggs,
The writ of error
coram nobis
was properly denied appellants for the reаson that all the alleged errors of the court which tried them for their crime and all other facts alleged in their petition were known to them at the time they made their motion for a new trial as well as at the time of their appeal
(People
v.
Dunlop,
Their petition for a writ of habeas corpus is equally as hopeless. Appeal from a decision of a superior court on habeas corpus has not been authorized.
(Loustalot
v.
Superior Court,
Wanting in all the essentials of a valid petition for either of the writs requested, the denial thereof was correct. Furthermore, the superior court had no jurisdiction to entertain appellants’ petition since their appeal had been decided by this court which, consequently, had exсlusive original jurisdiction of the petition. (Pen. Code, § 1265; amended Stats. 1949, ch. 1309, § 2.)
*319
About one week prior to the hearing of the cause presented by petitioners for a writ of error
coram nobis
or for a writ of habeas corpus petitioners filed with the clerk of this court their petition for a writ of certiorari to be directed to the Superior Court of Los Angeles County commanding such court to certify to this court “the complete records, all in its entirety” and all proceedings of the case including notes, minutes, arguments by the district attorney for a review аnd determination by this court on the following grounds: (1) The proceedings are invalid under the Fourteenth Amendment to the federal Constitution in that the district attorney committed misconduct in filing an
ex parte
amеnded information and that petitioners were twice put in jeopardy for the same offense; (2) the superior court had no jurisdiction to pass upon the petition for writ of error
coram nobis
or for writ of habeas corpus as an alternative remedy; (3) the superior court misinterpreted the Fourteenth Amendment to the federal Constitution; (4) in the interest of uniformity of decisiоn between this court, the Supreme Court and the United States Supreme Court; (5) the superior court has not decided the federal questions of substance not theretofore determined or has decided them in a way not in accord with applicable decisions of such courts; (6) by allowing the amended information the trial court did abridge the privileges and immunities of thе law clauses of your petitioners, as is guaranteed by the fourteenth amendment . . . and has ‘ disregarded’ the authority of the state Supreme Court decision
(People
v.
Parker,
Such petition is not accompanied by points and authorities as provided by rule 56 of Rules on Appeal and is therefore not entitled to consideration by this court. Moreover, certiorari is not an available remedy where the right of appeal exists or where the inferior tribunal had jurisdiction to enter the judgment complained of which, in fact, was entered and affirmed on appeal.
The judgment is affirmed. The petition for writ of certiorari is denied.
McComb, J., and Wilson, J., concurred.
