Tim Becker wrote:

> It sounds like there's some sort of index at the beginning of the file
> you're changing. E.g. at the beginning of the file it says: 3 bytes of
> data, followed by an image. If you substitute "CD3" for "CD45", you'd
> also have to update the index at the beginning to say "4 bytes of
> data, followed by an image".
> 
> I'm afraid I don't know FACS, but it sure sounds like the nature of
> the file format doesn't allow you to just search and replace in the
> file without updating some context information as well.
>    -tim

I don't know FACS either but I ask the technical services and they say 
it is a kind of meta data file. If I insert extra characters into the 
file I have to remove equal extra spaces from somewhere else in the 
file.

Li

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