VFP7 SP1

>What version and Service Pack are you using?
>
>>Hello all,
>>
>>I have recently been getting a lot of C5 errors when altering the structure of tables and think I have found the problem.
>>
>>When I try and run the following command in a loop I get a C5
>>
>>Alter table x alter column y n(3)
>>
>>The problem occurs when the field y is used in an index
>>I have a few indexes which look like : field1 + str(y) + field3
>>these seem to cause the most trouble.
>>
>>Has anyone else encountered anything like this?
>>My workaround is to delete tag all & recreate but its a bit of a pain!
>>
>>Thanks
>>
>>Will