Robert Joseph Williams, Texas prisoner # 757180, appeals from the district court’s sua sponte dismissal of his 42 U.S.C. § 1983 civil rights complaint for failure to exhaust administrative remedies, pursuant to 42 U.S.C. § 1997e, with prejudice to proceeding in forma pauperis (IFP) pursuant to 28 U.S.C. § 1915(b). Williams had alleged that the prison doctor was deliberately indifferent to his serious medical needs. In his appellate brief, Williams does not address the district court’s conclusion that he failed to exhaust administrative remedies by filing prison grievances. He neither denies failing to pursue such remedies nor argues that he has a *311 valid defense to the exhaustion requirement. Failure to identify an error in the district court’s analysis is the same as if the appellant had not appealed the judgment. See Brinkmann v. Dallas County Deputy Sheriff Abner, 818 F.2d 744, 748 (5th Cir. 1987). Because Williams has failed to contest the district court’s conclusion that he failed to satisfy the exhaustion requirement, he has waived the only issue relevant to his appeal. See Yohey v. Collins, 985 F.2d 222, 225 (5th Cir. 1993) (issues not briefed are deemed abandoned).

Williams’s appeal is without arguable merit and is thus frivolous. See Howard v. King, 707 F.2d 215, 220 (5th Cir. 1983). Accordingly, the appeal is DISMISSED. 5th Cir. R. 42.2. The dismissal of this appeal counts as a “strike” for purposes of 28 U.S.C. § 1915(g), as does the district court’s dismissal as frivolous. See Adepegba v. Hammons, 103 F.3d 383, 387-88 (5th Cir. 1996). We caution Williams that once he accumulates three strikes, he may not proceed IFP in any civil action or appeal filed while he is incarcerated or detained in any facility unless he is under imminent danger of serious physical injury. See 28 U.S.C. § 1915(g).

APPEAL DISMISSED; SANCTION WARNING ISSUED.