https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Unclassifiable-error-on-second-call-to-dss-reorder/m-p/806967#M3494 Hi,<DIV></DIV><DIV>Where do you call dss_factor?</DIV><DIV></DIV><DIV>Regards,</DIV><DIV>Konstantin</DIV> Mon, 27 Feb 2012 04:22:24 GMT Konstantin_A_Intel 2012-02-27T04:22:24Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Unclassifiable-error-on-second-call-to-dss-reorder/m-p/806963#M3490 <P>I am solving a nonlinear problem that requires me to construct and solve a matrix many times for which I wish to use dss in MKL10.2.6.038.The code is in fortran 90 and I use ifort 11.0.046.The structure of the matrix changes and hence the solver has to be deleted and reconstructed at every iteration. When I run my code , it runs fine the first time, however on the second iteration, dss_reorder crashes with an unclassifiable error. <BR />This happens irrespective of whether the matrix is the same or not. the second call to dss_reorder fails. Any ideas?</P> Sat, 18 Feb 2012 00:04:37 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Unclassifiable-error-on-second-call-to-dss-reorder/m-p/806963#M3490 potaman 2012-02-18T00:04:37Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Unclassifiable-error-on-second-call-to-dss-reorder/m-p/806964#M3491 I tried changing to 10.3.3.174 and got that a Memory Overwrite in lda-m gap error. any idea what this means?<BR /> Sat, 18 Feb 2012 00:45:40 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Unclassifiable-error-on-second-call-to-dss-reorder/m-p/806964#M3491 potaman 2012-02-18T00:45:40Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Unclassifiable-error-on-second-call-to-dss-reorder/m-p/806965#M3492 <I>"The structure of the matrix changes and hence the solver has to be deleted and reconstructed at every iteration" - what do you mean by "the solver has to be deleted"? Please show thow order of invoking dss routines and be much better if you give us the test case.</I><DIV><I>--Gennady</I></DIV> Sat, 18 Feb 2012 04:50:12 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Unclassifiable-error-on-second-call-to-dss-reorder/m-p/806965#M3492 Gennady_F_Intel 2012-02-18T04:50:12Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Unclassifiable-error-on-second-call-to-dss-reorder/m-p/806966#M3493 Step 1 .<DIV></DIV><DIV></DIV><DIV>At each time step do,</DIV><DIV></DIV><DIV>error = dss_create(handle,MKL_DSS_DEFAULTS)</DIV><DIV>error = dss_define_structure(handle,MKL_DSS_NON_SYMMETRIC,ia,n,n,ja,nnz)</DIV><DIV>dss_reorder(handle,MKL_DSS_AUTO_ORDER,perm)</DIV><DIV></DIV><DIV>!! then for a number of iterations I do.</DIV><DIV></DIV><DIV>error = dss_solve_real(handle,MKL_DSS_DEFAULTS,b,1,x)</DIV><DIV></DIV><DIV>!! After the code has converged</DIV><DIV></DIV><DIV>error = dss_delete(handle,MKL_DSS_DEFAULTS)</DIV><DIV></DIV><DIV></DIV><DIV>At the first time step this works fine. at the second time step . I am able to create the solver and define its structure. but when the call is made to dss_reorder, I get</DIV><DIV></DIV><DIV><DIV id="_mcePaste">Memory overwrite in lda-m gap: loc( -65536, 21322608) = 0.0000000 , Invalid message level</DIV><DIV></DIV> </DIV><DIV></DIV><DIV></DIV> Mon, 20 Feb 2012 19:39:51 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Unclassifiable-error-on-second-call-to-dss-reorder/m-p/806966#M3493 potaman 2012-02-20T19:39:51Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Unclassifiable-error-on-second-call-to-dss-reorder/m-p/806967#M3494 Hi,<DIV></DIV><DIV>Where do you call dss_factor?</DIV><DIV></DIV><DIV>Regards,</DIV><DIV>Konstantin</DIV> Mon, 27 Feb 2012 04:22:24 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Unclassifiable-error-on-second-call-to-dss-reorder/m-p/806967#M3494 Konstantin_A_Intel 2012-02-27T04:22:24Z