Using VFP7.

I have a table in my form that I display in a grid. I want to be able to set a filter on the table when a user selects a value from a drop down.

In my drop down Interactivechange I do this:

***
SELECT mytable
LOCAL lcfilter
lcfilter = THISFORM.combo.value
SET FILTER TO mytable.myfield = lcfilter
***

When I do this, I keep getting an error "Variable lc_product is not found".

How do you set a filter in a form?

Thanks,

Jerryt