Dear All,

I am trying to use Pardiso to solve sparse linear equations. As a new user of Pardiso, i just do some simple modification of the example. The program read in the matrix and right hand values (ia, ja, a, b) from files, solve the equations and then output x to files. It is strange to find out that for the first two tests with small matrix size (5*5 and 552*552), the result is correct. But for the last two tests with large matrix size (7728*7728), all the results is nan, but the pardiso doesn't give any error.

The system is win7 x64, intel parallel studio xe2013, build win32 release.

Can anybody give me some advice or help me to check?

Thanks and regards,

Daniel