Dyna做跌落模拟计算报错，请大神们帮忙解答一下？ 20

 Error 30059 (INI+59)

     cannot find element of slave segment 49 of interface 2

     Message 30059 (INI+59) exceeds 50 times

     Further printing will be suppressed from screen only

     You can change the limit (MSGMAX) at field 4 of card 2 of *CONTROL_OUTPUT

 *** Error 30025 (INI+25)

     massless node 2331572 on the master side of surface 6 type 3

     This could be lead to a segment with no parent element defined.

 

The LS-DYNA time step size should not exceed     1.097E-05

 to avoid contact instabilities.  If the step size is

 bigger then scale the penalty of the offending surface.