>I have a VFP 6.0 dbc with dbfs as the basis for a complex multiuser system
>used by 10 operators at the same time. My client has also been using crystal
>reports to run ad hoc reports on these tables. I took one of the dbfs out of
>the dbc, modified the length of some fields, added several new fields
>including some memo fields, then put the dbf back in the dbc, reindexed it
>and packed it. The VFP multiuser system is running just like it always has.
>However when the client trys to run one of his crystal reports he gets
>'IDAPI Error: Corrupt Header'.
>
>Any idea how the header could be corrupt for crystal but not for VFP itself?

First, Crystal cannot directly read VFP tables. It must use ADO or ODBC to get to them. I can read Fox2X tables driectly. Second, Crystal keeps track of fields by their location in the table, not by field name. This means that if you remove or rearrange fields that crystal will not work correctly.