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                                                                    EXHIBIT 99.7
 
                             BOOLE & BABBAGE, INC.
 
                                 March 18, 1999
 
To the Stockholders of
Boole & Babbage, Inc.
 
You should have previously received a notice of special meeting dated February
26, 1999 and a proxy statement/prospectus relating to a special meeting of the
stockholders of Boole & Babbage, Inc. to be held on March 30, 1999 at 12:00 p.m.
at the principal executive offices of Boole located at 3131 Zanker Road, San
Jose, California. As you know, at the special meeting, the Boole stockholders
will be asked to adopt the merger agreement among Boole, BMC Software, Inc. and
Ranger Acquisition Corp., and approve the merger described in the merger
agreement.
 
For your information, we are enclosing with this letter a Current Report on Form
8-K that BMC recently filed with the Securities and Exchange Commission. The
enclosed Form 8-K includes information relating to the proposed acquisition by
BMC of New Dimension Software Ltd., and certain litigation recently filed
against BMC.
 
As we mentioned in the proxy statement/prospectus, your Board of Directors has
determined that the merger is fair to stockholders and is in your best
interests. Your vote on the merger is very important. Therefore, we urge you to
vote as soon as possible if you have not already done so.
 
Sincerely,
/s/ Arthur F. Knapp, Jr.
Arthur F. Knapp, Jr.
Secretary