Re: On entry to DLASDA parameter number 2 had an illegal value

[Jaroslav Hajek]

On Sun, Jul 25, 2010 at 11:14 PM, lo <address@hidden> wrote:
> hello,
>
> on running the following under octave 3.3.51 on a Linux Suse 11.2
>
> A = [ 0.50374   0.61402   0.43301; 0.60290   0.78609   0.43301 ]
> B = [ -1.0531; -1.0531 ]
> X = A\B; % solve A X = B
>
>
> I get:
>
>  ** On entry to DLASDA parameter number  2 had an illegal value
> A =
>
>   0.50374   0.61402   0.43301
>   0.60290   0.78609   0.43301
>
> B =
>
>  -1.0531
>  -1.0531
>
> error: test: exception encountered in Fortran subroutine dgelsd_
>
>
> thanks for any help,
>

Did you link Octave with ARPACK? This kind of error occurred to me
several times when I built ARPACK with the default configuration so
that it mixed with LAPACK routines. The best approach is to ignore the
comment in ARPACK about possible problems with LAPACK 3 (none were
observed) and build it against your normal shared LAPACK library.

hth

-- 
RNDr. Jaroslav Hajek, PhD
computing expert & GNU Octave developer
Aeronautical Research and Test Institute (VZLU)
Prague, Czech Republic
url: www.highegg.matfyz.cz