EXHIBIT 24

                               POWER OF ATTORNEY


     Know all by these presents, that the undersigned hereby constitutes and
appoints Denise M. Clolery, Chris C. Chaffin and Patrick Tagtow, and each of
them, acting singly, as the undersigned's true and lawful attorney-in-fact to:

     (1) execute for and on behalf of the undersigned, in the undersigned's
         capacity as an officer and/or director of BMC Software, Inc. (the
         "Company"), Forms 3, 4 and 5 in accordance with Section 16(a) of the
         Securities Exchange Act of 1934 and the rules thereunder;

     (2) execute for and on behalf of the undersigned, in the undersigned's
         capacity as an officer and/or director of BMC Software, Inc. (the
         "Company"), Form 144 in accordance with Rule 144 under the Securities
         Act of 1933 and the rules thereunder;

     (3) do and perform any and all acts for and on behalf of the undersigned
         which may be necessary or desirable to complete and execute any such
         Form 3, 4, 5 and 144 timely file such form with the United States
         Securities and Exchange Commission and any stock exchange or similar
         authority; and

     (4) take any other action of any type whatsoever in connection with the
         foregoing which, in the opinion of such attorney-in-fact, may be of
         benefit to, in the best interest of, or legally required by, the
         undersigned, it being understood that the documents executed by such
         attorney-in-fact on behalf of the undersigned pursuant to this Power of
         Attorney shall be in such form and shall contain such terms and
         conditions as such attorney-in-fact may approve in such
         attorney-in-fact's discretion.

     The undersigned hereby grants to such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact, or such
attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be
done by virtue of this power of attorney and the rights and powers herein
granted. The undersigned acknowledges that the foregoing attorney-in-fact, in
serving in such capacity at the request of the undersigned, is not assuming, nor
is the Company assuming, any of the undersigned's responsibilities to comply
with Section 16 of the Securities Exchange Act of 1934 or Form 144 in accordance
with Rule 144 under the Securities Act of 1933.

     This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4, 5 and 144 with respect to
the undersigned's holdings of and transactions in securities issued by the
Company, unless earlier revoked by the undersigned in a signed writing delivered
to the foregoing attorneys-in-fact.

     IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 21st day of August, 2006.

                                                      /s/ T. Cory Bleuer
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                                                             Signature

                                                      T. Cory Bleuer
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