[Bioperl-l] blast warning -- no valid letters to be indexed

[Ian Korf]

My guess is your sequence is all N's. Or maybe all lowercase and you  
have soft masking enabled. Or there are no letters at all.

-Ian

On 16 Dec 2003, at 04:45, Liu Haifeng wrote:

> Can anyone tell me if the following waring is critical or what is its
> meaning when I perform bl2seq?
> ----------------------------------------------------------------------- 
> -----
> -----------
> [bl2seq] WARNING: [000.000] Blast: No valid letters to be indexed on  
> context
> 0
> ----------------------------------------------------------------------- 
> -----
> -----------
> thanks in advance!
>
> Haifeng
>
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