THE SLAVE SURFACES ASSEMBLY CP-1-CONCRETE-1 AND ASSEMBLY_CP-4-CONCRETE-1 INTERSECT EACH OTHER. THEY ARE PAIRED WITH MASTER SURFACES ASSEMBLY_PICKEDSURF74 AND ASSEMBLY PICKEDSURF77 THAT ALSO INTERSECT EACH OTHER.IF BOTH PAIRS ARE *CONTACT PAIRs, THESE TWO PAIRS SHOULD NOT BE SIMULTANEOUSLY PRESENT IN A STEP BECAUSE OF POSSIBLE CONVERGENCE PROBLEMS; USE *MODEL CHANGE,TYPE=CONTACT PAIR TO REMOVE ONE OF THEM. IF BOTH ARE *TIE PAIRS, THE REDUNDANT TIES WILL BE REMOVED AUTOMATICALLY. IF ONE PAIR IS *TIE AND ANOTHER IS *CONTACT PAIR, REMOVE ONE OF THEM. abaqus出现以上问题该如何解决？