>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 ?


In SQL, it should. In VFP, the max length of the index is 240 with machine collate, 120 with other collation sequences.

In a way it makes sense, but I'm as surprised as you are.