Fea此类情况咋破,求大神

> -----------------------------------------S T A R T I N G S O L U T I O N
>
> ITERATIVE SOLVER
> AVAILABLE MEMORY = 2.8 GBYTES
> ENTRY PHASE FOR RENUMBERING
> THE INDIVIDUAL ELEMENT STIFFNESS AND LOAD MATRICES WILL NOW BE FORMED.
> ELEMENT NO. : 1476 OF 1476
> ENTRY LOAD_BLOCK
> TOTAL NUMBER OF VALID DOFS IN MODEL : 8856
> ENTRY ASSM_STIFF_LOAD ( FORM GLOBAL EQUILIBRIUM EQUATIONS IN BLOCKS )
>
> ENTRY STATIC ANALYSIS
> INCOMPLETE ITERATIVE SOLVER
> IERROR= -1
> 不正常的执行中断！