dorsal team mailing list archive

[Douglas Arnold <arnold@xxxxxxx>]

The follow code, which does an LU factorization using the uBLAS
backend, runs fine for me under Ubuntu, but produces an
error (shown) under Fedora 11.  I am guessing this
has to do with dorsal and the Fedora 11 install (I installed
from dorsal 0.7.1).  Any ideas?  (Or should I mail another list?)

from dolfin import *
parameters["linear_algebra_backend"] = "uBLAS"
mesh = UnitSquare(2,2)
V = FunctionSpace(mesh, 'CG', 1)
v = TestFunction(V)
u = TrialFunction(V)
a = u*v*dx
A = assemble(a)
lusolver = LUSolver()
lusolver.factorize(A)



: viper 1003; python solve1.py
Warning: Converting real-valued parameter to double, might loose precision.
Warning: Converting real-valued parameter to double, might loose precision.
Matrix of size 9 x 9 has 41 nonzero entries.
Sorting sparsity pattern.
LU-factorizing linear system of size 9 x 9 (UMFPACK).
UMFPACK problem related to call to symbolic
*** Warning: UMFPACK is reporting an unknown error.
UMFPACK problem related to call to numeric
[viper:03057] *** Process received signal ***
[viper:03057] Signal: Segmentation fault (11)
[viper:03057] Signal code: Address not mapped (1)
[viper:03057] Failing at address: 0x40
[viper:03057] [ 0] [0x6be40c]
[viper:03057] [ 1] /lib/libgcc_s.so.1(_Unwind_RaiseException+0x85) 
[0xc67ef5]
[viper:03057] [ 2] /usr/lib/libstdc++.so.6(__cxa_throw+0x64) [0x12774f4]
[viper:03057] [ 3] 
/usr/local/bin/FEniCS/lib/libdolfin.so.0(_ZNK6dolfin6Logger5errorESs+0x98) 
[0x26fda68]
[viper:03057] [ 4] 
/usr/local/bin/FEniCS/lib/libdolfin.so.0(_ZN6dolfin5errorESsz+0x95) 
[0x2700ce5]
[viper:03057] [ 5] 
/usr/local/bin/FEniCS/lib/libdolfin.so.0(_ZNK6dolfin15UmfpackLUSolver7Umfpack12check_statusElSs+0x144) 
[0x26f2984]
[viper:03057] [ 6] 
/usr/local/bin/FEniCS/lib/libdolfin.so.0(_ZN6dolfin15UmfpackLUSolver7Umfpack9factorizeEv+0x127) 
[0x26f2e17]
[viper:03057] [ 7] [0x40]
[viper:03057] *** End of error message ***
Segmentation fault