>>>As stated before in this thread, this is NOT a bug. From help on Alter table:
>>>
>>>ALTER TABLE might not produce consistent results when used with Visual FoxPro cursors created by the CREATE CURSOR command. In particular, you can create a Visual FoxPro cursor with features, such as long field names, that are normally available only with tables...>
>>
>>Pretext explanation. If long field name doesn't supported for cursors VFP should give an error "You cannot use long field names with cursors". That would be clearly.
>>
>>VFP behaviour strange with this issue. gives different unrelative erros with different conditions...
>>
>>It's a bug for me.
>
>You can in deed use long field names in cursors, but you can not alter the structure of a cursor which has long field names. This is documented, and thus not a bug.

I agree that it's not a bug, as I already pointed out here: Re: Long field name bug Thread #1171727 Message #1171795, because it actually is documented.

However, the behavior is troublesome and should be addressed by the vfp-devteam anyway. Arguments:

- The developer is not always aware of the exceptions. Perhaps the ALTER TABLE is even done in a generic routine that cannot possibly be aware of the exceptions unless it extensively tests for them.

- It must be doable for the devteam to alter a cursor that has long fieldnames or other exceptions.

- If altering cursors is really troublesome in some conditions for the devteam, then they should have decided to not let ALTER TABLE support cursors in any condition.