Excel 2000 Error

I have a user who has an Excel error. She uses an Access Database to pull data from Oracle and then copy the data into an Excel spreadsheet. Everything works fine except each time it copies into Excel, Excel generates and error message:

The instruction at “0x30060870” referenced memory at “0x1194ff08”. The memory could not be “read”. Click on OK to terminate the program.

Everything works as it should, but this message pops up continuosly and she has to keep clicking OK. Anyone know how to get rid of this?