>>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 ?
>
>Probably a bug. You may want drop the index yourself.

Can't drop the index - existing code would blow up. I'm just going to content myself with keeping the field length below the 240 limit ......