Too many attempts made for this increment

做了一个小案例，结果提示错误：
Too many attempts made for this increment
Abaqus/Standard Analysis exited with an error - Please see the message file for possible error messages if the file exists.
警告：
The dilation angle is small or zero. The value will be set to 0.10000
The dilation angle is small or zero. The value will be set to 0.10000
There are 3 unconnected regions in the model.
模型上面是个荷载板，中间是硬土层，下面是软土层。边界是左右和下面固定，请问如何解决