Hi Sylvain,
>1) INDEX ON MyField TO IDXFile doesn't need exclusive use

But it will only work when the table is not opened with buffering in any datasession of the current VFP instance.

>2) SELECT * FROM MyTable INTO CURSOR curTemp
>INDEX ON MyField TAG MyField (VFP will delete the index at the same time the cursor is closed)

Add a NOFILTER to the SELECT statement. Otherwise you likely end up with the original table used again by VFP and the INDEX command fails.

Christof