EXHIBIT 99.1

                                CERTIFICATION OF
                            CHIEF EXECUTIVE OFFICER
                             OF BMC SOFTWARE, INC.
                       PURSUANT TO 18 U.S.C. SECTION 1350

     I, Robert E. Beauchamp, Chief Executive Officer of BMC Software, Inc. (the
"Company"), hereby certify that the accompanying report on Form 10-Q for the
period ending June 30, 2002 and filed with the Securities and Exchange
Commission on the date hereof pursuant to Section 13(a) of the Securities
Exchange Act of 1934 (the "Report") by the Company fully complies with the
requirements of that section.

     I further certify that the information contained in the Report fairly
presents, in all material respects, the financial condition and results of
operations of the Company.


                                             /s/ ROBERT E. BEAUCHAMP
                                             -----------------------------------
                                             Name: Robert E. Beauchamp

                                             Date: August 13, 2002