求助，excite pu的连杆EhD分析

lihuimei

excite pu的连杆EhD分析时，遇到以下问题，请高手告知是啥意思？第一次做，不明白。
Warning (Code 9990007)
The following joints/constraints might be too inaccurate.
Their individual right hand sides (accuracy) are given.
User action:
(1) Check the joint properties of these joints.
(2) Check the positions, orientations and orientations of
the connected body nodes.
for constraint 6@ - GuidLine1 no.   2 accuracy is      12131.     mm/s



Warning (Code 9960010)
Body Conrod1:
The initial angular velocity number 1 was changed from  -62.832 rad/s
to  -18.407 rad/s in order to be consistent. The absolute value of the change
is 44.4246796052 rad/s.


Warning (Code 9930010)
Non-constant step size was requested. Tried to undershoot minimum step size
more than once due to troubles in model loop.
Reject step and try to restart BDF solver with order 1
changed BDF order from   2 to   1

Warning (Code 9930003)
Model loop was not accepted at minimal step size -> step size cannot be changed.
As the simulation is still in the initialization phase, accept step and try
to continue with next time step.

Information (Code 2690001)
The BDF order was increased from 1 to 2.