Hello everyone,

I met a tricky problem when solving a sparse unsymmetric complex matrics with fotran pardiso MKL within Windows environment:

I installed Mircosoft Visual Studio 2012 and Intel Parallel Studio XE 2013 (not quite sure the version of MKL).

When I specifies the phase parameter inside the subroutine with either 11, 22, or 33, the executable file got stuck and stop running. If changed to 1, 2 and then 3 phase by phase, the result are not reliable unfortunately and the following was present when the msglvl goes to 1 :

*** Error in PARDISO ( sequence_ido,parameters) error_num= 20

*** wrong control step parameter ido 1

=== PARDISO: solving a complex nonsymetric system ===

================

Times:

======

Time spent in additional calculations : 0.002354 s

Total time spent : 0.002354 s

Statistics:

===========

< Parallel Direct Factorization with number of processors: > 2

< Numerical Factorization with BLAS3 and O(n) synchronization >

< Linear system Ax = b >

number of equations: 1278

number of non-zeros in A: 13434

number of non-zeros in A (): 0.822515

number of right-hand sides: 1

< Factors L and U >

number of columns for each panel: 128

number of independent subgraphs: 0

< Preprocessing with state of the art partitioning metis>

number of supernodes: 0

size of largest supernode: 0

number of non-zeros in L: 0

number of non-zeros in U: 0

number of non-zeros in L+U: 0

*** Error in PARDISO ( sequence_ido,parameters) error_num= 20

*** wrong control step parameter ido 2

=== PARDISO: solving a complex nonsymetric system ===

================

Times:

======

Time spent in additional calculations : 0.000108 s

Total time spent : 0.000108 s

Statistics:

===========

< Parallel Direct Factorization with number of processors: > 2

< Numerical Factorization with BLAS3 and O(n) synchronization >

< Linear system Ax = b >

number of equations: 1278

number of non-zeros in A: 13434

number of non-zeros in A (): 0.822515

number of right-hand sides: 1

< Factors L and U >

number of columns for each panel: 128

number of independent subgraphs: 0

< Preprocessing with state of the art partitioning metis>

number of supernodes: 0

size of largest supernode: 0

number of non-zeros in L: 0

number of non-zeros in U: 0

number of non-zeros in L+U: 0

*** Error in PARDISO ( sequence_ido,parameters) error_num= 20

*** wrong control step parameter ido 3

=== PARDISO: solving a complex nonsymetric system ===

================

Times:

======

Time spent in additional calculations : 0.000102 s

Total time spent : 0.000102 s

Statistics:

===========

< Parallel Direct Factorization with number of processors: > 2

< Numerical Factorization with BLAS3 and O(n) synchronization >

< Linear system Ax = b >

number of equations: 1278

number of non-zeros in A: 13434

number of non-zeros in A (): 0.822515

number of right-hand sides: 1

< Factors L and U >

number of columns for each panel: 128

number of independent subgraphs: 0

< Preprocessing with state of the art partitioning metis>

number of supernodes: 0

size of largest supernode: 0

number of non-zeros in L: 0

number of non-zeros in U: 0

number of non-zeros in L+U: 0

I do not know what the reason is, the version of my MKL ?

Thanks in advance.