A fatal error has occurred during computations:
*** ERROR # 312 ***
In static load case 2
the compliance is negative or large 2.311963E+08
Optimization/buckling analysis cannot be performed
due to possible rigid body mode
FEASIBLE DESIGN.
RAM: 236 MB total, 236 MB used.
Data arrays: 424 total, 226 allocated.
...
这是说的什么意思?应该怎样改正?求。。。。解
附OUT文件