Failure of Lapack when OpenMP directive Enabled

    I build a project (vs2010 + IVF)  calling Lapack subroutines, but when I enable process OpenMP directives( Generate parallel code), and i encounted the 

Debug Assertion Failed!

File:f:\dd\vctools\crt_bld\self_x86\crt\src\winsig.c 

Line: 417

Expression:(" Invalid signal or error",0)

program main
implicit none

     integer,parameter:: NMAX = 4000
     integer,parameter:: LWORK = 100*NMAX
     integer IPIV(NMAX)  
     complex WORK(LWORK)
     INTEGER LDA, INFO

     INTEGER maxedge ,error,ii

    Complex ,allocatable:: cmtx(:,:),crhs(:)

    maxedge = 1396

    allocate(cmtx(maxedge,maxedge),crhs(maxedge),stat=error)
    if(error .ne. 0)then
         print *,'Allocate cmtx and crhs failure'
         stop
    endif
    cmtx = (0.0,0.0)
    do ii = 1,maxedge 
            cmtx(ii,ii) = (1.0,0.0)
    enddo 

    print *,'Start LU decompostion '

    LDA = maxedge
    call CGETRF(maxedge,maxedge,cmtx,LDA,IPIV,INFO)
    if( INFO .eq. 0)then
             call CGETRI(maxedge,cmtx,LDA,IPIV,WORK,LWORK,INFO)
             if(INFO .eq. 0) print *,'LU Success'
    else
        print *,'Lapack Factor failure'
       stop
    endif

     stop
end program