>Hi,
>
>Is this a known issue (not mentioned in the docs AFAICS):
>
>I'm issuing the following:
>
>ALTER TABLE Printers ALTER COLUMN DeviceName C(250)
>
>There's a regular index on this field (which initially has a length of 40)
>
>I get an 'Invalid key length' message box but the field length is altered and *the index is dropped* !
>
>Surely it should completely reject the change ?

If you neef the index for anything then ==, yes. Or at least only up to 120/240 chars, depending on your settings.
If you only need == then you might use a HASH as index. I do this with some memos.

Lutz