>…

>The output strangely has the north arrow pointing south (I am using 5.2.6 – however older datasets seem to process OK so >far).

>The fixed points and the surface image are aligned almost perfectly, but the grid appears to be about 10m too far north >relative to the fixed points and surface image.

>…

Problem solved.

I discovered that I had entered co-ordinates 2000km too far north, so outside the valid range for this co-ord system.  My scruffy topo map had 6's that looked like 8's.

I guess when the log file says

"meridian convergence (deg): 175.85"

You know there's got to be a positioning problem, as it seems to hover around +-few degrees usually.

So I'll concede Therion is working perfectly and user error is to blame!

Apologies

Bruce