question about pdgbtrf

question about pdgbtrf


Where I could find a manual and / or examples of the use of the function pdgbtrf?

Function returns me the error:

{... ...}: On entry to   parameter number 9 had an illegal value  

 PDGBTRF: auxiliary storage error

info: -9;



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There is an example driver at .

Since you did not show the calls to Scalapack that caused an error, I cannot comment on what could have gone wrong.

The Scalapack documentation is available at .

Thank you very much for the useful links

Have you ever tried to invoque this from a C code?


Eduardo J. Sanchez P.

For a long time I use only C++. I do not remember what kind of mistake I made. But I've never had more problems using function  pdgbtrf based on the attached example driver by Macej4.


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