EXHIBIT 99.1

                                                            
TIBCO Press Contact:        Talarian Press Contact:               Investor Relations Contact:
Caroline Phillips           Carolyn Robinson                      Michael Magaro
TIBCO Software Inc.         Talarian Corporation                  TIBCO Software Inc.
(650) 846-5697              (650) 965-8050 x125                   (650) 846-5428
caroline@tibco.com          carolyn.robinson@talarian.com         mmagaro@tibco.com
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                     TIBCO and Talarian Announce Memorandum
                   of Understanding to Settle Pending Lawsuit

     Palo Alto and Los Altos, CA - April 22, 2002- TIBCO Software Inc. (Nasdaq:
TIBX) and Talarian Corporation (Nasdaq: TALR) jointly announced today that
Talarian had entered into a memorandum of understanding with counsel to the
plaintiffs to a lawsuit, Robert Mathiason v. Talarian Corporation, originally
filed on January 8, 2002 in the Superior Court of the State of California for
the County of Santa Clara. The terms of the settlement contemplated by the
memorandum of understanding will not have a material adverse effect on Talarian.

     Under the terms of the memorandum, Talarian and the plaintiffs to the
above-named action have agreed, subject to approval by the court, to enter into
a settlement with respect to all claims raised by the plaintiffs to the lawsuit.
If the court approves the settlement contemplated in the memorandum, the lawsuit
will be dismissed. However, there can be no assurance that the court will
approve the proposed settlement or that any ultimate settlement will be under
the same terms as those contemplated by the memorandum.

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Additional Information and Where You Can Find It

     In connection with the proposed acquisition of Talarian by TIBCO, TIBCO
filed with the Securities and Exchange Commission (the "SEC") on February 5,
2002, a registration statement on Form S-4, as amended on March 19, 2002, that
included the preliminary proxy statement of Talarian and prospectus of TIBCO.
The registration statement was declared effective by the SEC on March 21, 2002.
TIBCO and Talarian mailed the definitive proxy statement/prospectus about the
transaction to Talarian's stockholders on or about March 26, 2002. Both
companies filed this proxy statement/prospectus with the SEC on March 22, 2002.
Investors are advised to read the definitive proxy statement/prospectus, because
it contains important information regarding the transaction. Investors and
security holders may obtain a free copy of the definitive proxy
statement/prospectus and other documents filed by the companies at the SEC's web
site at http://www.sec.gov. This and such other documents may also be obtained
from TIBCO or Talarian by directing such requests to the companies.

     Talarian and its officers and directors may be deemed to be participants in
the solicitation of proxies from stockholders of Talarian with respect to the
transactions contemplated by the agreement. Information regarding such officers
and directors is included in the registration statement on Form S-4 described
above and in Talarian's amended Annual Report on Form 10-K/A for the fiscal year
ending



September 30, 2001, filed with the SEC on January 28, 2002. These documents are
available free of charge at the SEC's web site at http://www.sec.gov and from
Talarian.

Forward Looking Statements

This document contains forward-looking statements regarding TIBCO's and
Talarian's business and other factors that may affect future earnings or
financial results. Our actual results could differ materially from those
contained in such forward-looking statements. Reasons for why actual results
could differ materially include if Talarian is unable to settle the
above-referenced lawsuit on favorable terms or at all. Additional information
concerning factors that could cause our respective actual results to differ
materially from those contained in the forward-looking statements can be found
in the definitive proxy statement/prospectus filed by TIBCO and Talarian with
the SEC on March 22, 2002, including, without limitation, under the caption
"Risk Factors." In addition, TIBCO's and Talarian's filings with the SEC,
including but not limited to TIBCO's most recent reports on Forms 10-Q and 10-K
filed with the SEC on April 2, 2002 and January 30, 2002, and Talarian's Forms
10-Q, 10-K/A and 10-K filed with the SEC on January 31, 2002, January 28, 2002
and December 21, 2001, respectively, also identify important risk factors that
could cause actual results to differ from those contained in the forward-looking
statements, including limited independent operating history, history of losses,
unpredictability of future revenue, dependence on a limited number of customers,
TIBCO's relationship with Reuters Group PLC, rapid technological and market
changes, risks associated with infrastructure software and volatility of stock
price. Copies of filings made with the SEC are available through the SEC's
electronic data gather analysis and retrieval system (EDGAR) at www.sec.gov.
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Neither TIBCO nor Talarian assumes any obligation to update the forward-looking
statements included in this document.