(19)

(11)

EP 0 394 385 A1

(12)

(43) Date of publication: 31.10.1990 Bulletin 1990/44 (21) Application number: 89909351.0 (22) Date of filing: 27.07.1989

(51) International Patent Classification (IPC):  G06F 3/ 14( . ) G06F 17/ 30( . ) (86) International application number: PCT/US1989/003245 (87) International publication number: WO 1990/001191 (08.02.1990 Gazette 1990/04)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 27.07.1988 US 19880225034 27.07.1988 US 19880225036 27.07.1988 US 19880225033 27.07.1988 US 19880224922 27.07.1988 US 19880224895 (71) Applicant: BMC Software, Inc. Sugarland Texas 77478 (US)

(72) Inventors: HARPER, Thomas, A. Sugar Land, TX 77478 (US) WILES, Philip, V., Jr. Houston, TX 77083 (US) HARPER, Carol, R. Sugar Land, TX 77478 (US) ERNST, Theodore, R. Sugar Land, TX 77479 (US) (74) Representative: Altenburg, Udo, Dipl.-Phys., et al  Patent- und Rechtsanwälte, Bardehle . Pagenberg . Dost . Altenburg . Frohwitter . Geissler & Partner, Galileiplatz 1 D-81679 München D-81679 München (DE)