Hi Bill,

many thanks for the very fast analysis, the explanation and fix of the
MP display problem.

It works perfect now.

Best regards
Gerhard Dangl
www.dangl.at

Am 15.04.2017 um 19:09 schrieb Bill Gray pluto@...
[guide-user]:

> Hi Gerhard,
>
> The screen shots did the trick. After setting the same lat/lon,
> time, etc., I got the same behavior. If I center on the RA/dec
> for the "mp_off" image, most of the minor planets are missing;
> move a little, and they go back on again. That allowed me to track
> down the bug. It would affect any wide fields near the ecliptic
> poles.
>
> Guide has some code that computes a rectangle, in ecliptic
> coordinates, that covers the on-screen rectangle. It can then very
> quickly recognize that most asteroids, at the currently-specified
> time, cannot possibly be in that range of ecliptic latitude or
> longitude.
>
> The code in question makes displaying asteroids a _lot_ faster.
> But for some wide fields near the ecliptic poles, it could decide
> that the range in ecliptic longitude was effectively zero. That
> made it run even faster (since it would mean there were almost
> no asteroids to display), but it wasn't really what you would
> want to have happen. Fortunately, changing one line of code
> caused it to work properly.
>
> To ge the fix, download one of the following files and unZIP
> it in your Guide folder :
>
> https://www.projectpluto.com/temp/guide9.zip
> https://www.projectpluto.com/temp/guide9_8.zip
>
> Use the first for Guide 9 or 9.1, or the second for Guide 8.0.
> Things are actually a little trickier for Guide 8.0 users (though
> not by a lot); they should take a look at the following :
>
> https://www.projectpluto.com/update9.htm#guide8
>
> Essentially, this boils down to "don't apply a Guide 9 update
> unless you've applied the latest Guide 8.0 update."
>
> -- Bill
>