Excel Behaving Badly.

Hi,

I´m having trouble with an automated process.

First, access exports a table to a text file.
Second, excel opens the file and runs a macro on a workbook that contains linked data to the file.

The workbook is linked back in access.

A few days ago I started having problems. Sometimes the file can´t be exported because of authority problems (this is because the excel object doesn´t quit after having done the operations but locks the file so that the next time the process runs, it halts)

Question: Is there a command in VBA that absolutely certain kills the instance of excel? (in worst case I´m ok with a command that kills all instances of excel)

I also have problems within the macro itself. Excel complains about the "range method of global failed" or something like that.

The thing is, it works when I run just this part of the process, but not combined with a few others.

It worked fine until a few days ago, and the only thing I´ve done is that I have added a few graphs on the main form.

Has anyone had similar experiences? Might there be some sort of memory insufficiency?

Fuga.