Rich, If periodicity is used with this formula, it can/will cause a problem. It is not causing the problem we are seeing. I don't really know what is causing the problem yet. It could be that the functions coded in fpu087.c do not have sufficient error checking. Just a guess at this point, although these functions replace the ones used by the C parser in DOS. Jonathan
This par has periodicity=0, so the next statements don't matter. Periodicity uses the value of z to determine when to bailout. The Mystic2 formula uses LastSqr for determining when to bailout, which in this instance is g.x^2 + g.y^2. Therefore, periodicity would calculate bailout based on the wrong variable.
Can you reword the above in another way so that I can understand the issue?
When I read the above it seems to be saying that periodicity checking is causing the problem. But periodicity checking is turned off.