First, I thought something was wrong in my source. However, it seems that the error is occored by MoveToHandPosition method. Now I put appropriate values in "matrices", and I tried the next source code a few times.
for i in range(100):
There were times when this code ran normally.But, sometimes it caused the error which I mentioned above.
Why I fall into this situation !?
I would like to get some advice about this problems.
Thank you for your attention.