Hello Rene, hello all, After an investigation on the code, there is an issue storing the initial guess of the bvode() call; latter calls will get a zeros vector as guess and failed to converge. The bug 12418 [1] already report the issue, please comment here. IMHO this behavior might be handled without pushing the guessed values back to Scilab thus preserving the prototype.
[1]: https://bugzilla.scilab.org/show_bug.cgi?id=12418 Thanks, Clément > -----Original Message----- > From: users <users-boun...@lists.scilab.org> On Behalf Of Rene Djack > Sent: Thursday, July 16, 2020 2:05 PM > To: Users mailing list for Scilab <users@lists.scilab.org> > Subject: Re: [Scilab-users] bvode example broken? > > Also tested on linux/scilab 5.5.2 --> no error I will post in scilab bugzilla. > Thanks for your answers > Rgds > René > > > > > > Le mer. 15 juil. 2020 à 21:20, Stéphane Mottelet <stephane.motte...@utc.fr > <mailto:stephane.motte...@utc.fr> > a écrit : > > > Hi, > > Same error on OSX since 6.0.2 version. I cannot test for 5.5.2 version > because bvode was broken (it was fixed by desactivating optimization > compilation flags). > > > S. > > > Le 15/07/2020 à 20:24, Rafael Guerra a écrit : > > > Hi, > > Face same error in Win10 Scilab 6.1.0. > > But no such error in Win10 Scilab 5.5.2. > > Rgds, > > Rafael > > > > From: users <users-boun...@lists.scilab.org> <mailto:users- > boun...@lists.scilab.org> On Behalf Of Rene Djack > Sent: Wednesday, July 15, 2020 8:39 PM > To: users@lists.scilab.org <mailto:users@lists.scilab.org> > Subject: [Scilab-users] bvode example broken? > > > > Hello, > > I' m new to this list and to scilab too! > > Working on bvode, I try the example "Quantum Neumann > equation" found in the scilab help and i get the error message > > "Collocation matrix is singular" > > Is this example broken? > > Somebody have the same message? > > > > I'm using scilab 6.10 from scilab-6.10.bin.linux-x86-64.tar.gz > on > Ubuntu 20.4 > > > > Tanks for reading > > Regards > > > > > > > > _______________________________________________ > users mailing list > users@lists.scilab.org <mailto:users@lists.scilab.org> > > https://antispam.utc.fr/proxy/1/c3RlcGhhbmUubW90dGVsZXRAdXRjLm > Zy/lists.scilab.org/mailman/listinfo/users > > -- > Stéphane Mottelet > Ingénieur de recherche > EA 4297 Transformations Intégrées de la Matière Renouvelable > Département Génie des Procédés Industriels > Sorbonne Universités - Université de Technologie de Compiègne > CS 60319, 60203 Compiègne cedex > Tel : +33(0)344234688 > http://www.utc.fr/~mottelet > _______________________________________________ > users mailing list > users@lists.scilab.org <mailto:users@lists.scilab.org> > http://lists.scilab.org/mailman/listinfo/users > _______________________________________________ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
