Hope you can help me. I have encountered twice the same problem with the same macro in Excel Office 2007. My macro is making use of a âuser_formâ to enter variables. If I have attended to other work while using the excel macro after a while the macro (or the whole application) cannot find the user form anymore. Excel crashes and wants to recover. This takes ages and you have to use âend taskâ to stop the whole application. This is quite a nuisance, which did not happen with Excel 2003 version.