bill,

I agree with your approach but at present if I delete the a2.idx file in
the root, Guide recreates the file and the filtered a2 fails. But if I
replace it with a matching filtered a2 file (proper star count per arc
minutes of sky) Guide works just fine.

Denis

On 15/10/2012 5:53 PM, Bill J Gray wrote:
> Hi Denis,
>
> At least for the nonce, what I'd recommend doing is not having any
> a20.idx files at all. Guide can still access the A2.0 data; it will
> simply binary-search the entire file, rather than using the index to
> reduce the area to be binary-searched.
>
> If the A2.0 files are on CD or DVD, that can slow display a bit.
> On hard drives, it just doesn't matter very much. It should at least
> let you get things going until I post a version that looks for a20.idx
> in the same folder as the data.
>
> -- Bill
>
>
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