I'm in the process of learning TurboCad 2016. Today, in attempting to draw a rectangle and circle, I noticed the rectangle is missing the line from lower left side to bottom left, and the circle is missing a large part of the lower right quadrant. This occurred in both 32 bit and 64 bit versions. Can anyone pinpoint what the problem might be? Upon starting the program, I also get a message "This program is in use. Would you like to open the read only version?" I don't know if it affects working with the program, but it is annoying. I appreciate any help in overcoming these problems.