I am getting the following error 'Procedure declaration does not match description of event or procedure having same name', every time an event ( _Change ) fires, for a Tab control. It was working peerefctly weel and consistently, and I have not changed any code in it. There is also a Text Box on this continuous form, which is set with Conditional Formatting ( to output various background colours ). This has also stopped working for no apparent reason. Any help would be appreciated. Thanks.