Time Varying Parameter model

[ivory4]

The program I am running is working very well at the beginning, but if I continue to run the same program many many times(why I need to do this?I just change minor settings in the graph part), later it run into this problem.
It could be solved if I restart Rats.

However, if you run part of a program, you might start at a spot which leaves some variable uninitialized or set to a value from later in the program when it needs the values from the start.

[ivory4]

For a TVP model, discount is assigned at the begining, what would be the formula for calculating Prior W and V (given either W or V is chosen, EXACT option is used)?