Steve:
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Another thought... See the attached - I'd strongly suggest you use this "pre-filtering" box in Occult4 - especially check the setting of "passing within". I have 600km but 300km is another option. When Occult4 first finds an event it immediately looks at this value and if the path isn't within the set distance, then it drops that event and moves on. Thus, this selection has the potential to greatly speed up Occult4. If it's unchecked, Occult4 may very well add events that fall anywhere over the entire surface of the Earth to it's internal list (which later gets filtered). Thus, having this box unchecked is a serious way of causing an overload in Occult4.
Also, make sure the "site" that goes along with this is really your observing site - correct Lat/Long.
The other parameters above this also serve to "quickly" limit how long Occult4 takes to run and especially, the size of the INTERNAL database (before later filtering) it creates.
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George
George Viscome
