I took over a database from someone ca. one year ago. Since then, I have had various problems with it. My most recent and difficult is "Invalid Data Format". Sometimes when can enter the database and click on a command button, the message appears opening VB, highlighting a specific code, i.e. Private Sub cmd_Add_CO_Amendment_Click() The next time I enter the DB and click on the same command button, I receive no error message. Sometimes I must enter 3-4x before I receive no error. I have had several people look at the code and no one has been able to figure out what the problem is. So, any assistance would be greatly appreciated.