topic lapack errror : access violation in Intel® oneAPI Math Kernel Library

lapack errror : access violation

elquin — Thu, 29 Mar 2012 08:31:18 GMT

Dear all,

I'm testing IMSL and MKL library.

When I tested the attached code, the error comes out like :

forrtl: severe (157) : Program Exception - access violation

What should I have to change??

lapack errror : access violation

mecej4 — Thu, 29 Mar 2012 08:38:57 GMT

Please provide the input files mata.dat and matb.dat, which are required to run your program until the access violation point is reached.

It helps in resolving such problems if you can enable traceback when compiling your program.

lapack errror : access violation

elquin — Thu, 29 Mar 2012 08:40:00 GMT

Sorry for my prev. answer but I cannot find how i delete thread.

Here I attach matrix.

My environments are :

MS Visual Studio 2008

Intel Visual Fortran 11.1.065

MKL 10.2 update release 4

lapack errror : access violation

mecej4 — Thu, 29 Mar 2012 10:44:19 GMT

Line 38 of file mata.dat contains a number too large to be read into a single-precision real (0.743121979E+124). Likewise, in matb.dat you have -0.747209150E+127.

These errors abort the calculation before any MKL or IMSL routines get called.

I also note that dgerfs is called with argument arrays of type single precision real. That is probably incorrect.

At the refining stage, the pivot array generated during the factorization is needed. You are providing the uninitialized array ipiv for this purpose. That is an error. Since the values in this array are used as indices into the matrix, you are likely to run into access errors in the call to gerfs.