Hi,

I am using excel 2003, SP2 and have created a lot of VBA macros without any problems.

Now I have started making my own User Defined Functions and encuountered problems right away. A new function may work for an hour or so, but suddenly it dissipares from the list of functions and is not availible anymore. I am happy for every idea or advice on this inconsequent problem.

Thanks,
/ Maria