耦合不收敛，显示错误为：

mfy1107

结构场单独情况已算出，热场单独情况也算出，耦合不收敛，显示错误为：
*** WARNING ***   SUPPRESSED MESSAGE    CP=    710.891   TIME= 00:30:20
Contact element 368595 (real ID 1) status changes abruptly from contact
(with target element 367002) -> no-contact.                             

*** ERROR ***     SUPPRESSED MESSAGE    CP=   4948.656   TIME= 01:45:15
Preconditioned conjugate gradient solver error level 1.  Possibly, the  
model is unconstrained or additional iterations may be needed.  Try     
running with a multiplier MULT > 1 in EQSLV command (3 > MULT > 1).

请教高手如何解决