Yes if you make field names in a cursor less or equal 10 characters than you can apply ALTER TABLE.

>So, if I make all fields less then 11 chars it would work?
>
>>The ALTER TABLE command is not supported on cursors with long field names (longer that 10 characters).
>>
>>>I am trying to ALTER a cursor that has a logical field to numeric. The cursor is readwrite. When I issue:
>>>ALTER TABLE cursorname ALTER COLUMN fieldname I
>>>then I am getting "Invalid operation for the cursor".
>>>But if I browse that cursor, then go to Properties and manually change one of the fields type, then after this I can run my command with no problem. Why it is working that way?