=EDATE and =EOMONTH #N/A Error

[andyditchfield]

I am having numerous crash problems in Excel 2007. Some of the with files were developed (and used trouble free) previously in Excel 2003 - others created directly in Excel 2007.
One of the problems appears to be the use of the EDATE and EOMONTH functions which were part of the analyst toolpack addin in 2003. This error is sporadic and causes the underlying cell value to be changed to #N/A when the file is re-opened.
Is anyone else having such issues and if so have you found a solution?
Thanks

 

[Obit]

Does anyone know if there has been a fix posted by Microsoft for this?
Have been using 2007 and eomonth function for some time but only in the last couple of weeks has this error arisen (files are saved in compatibility mode to excel 2003).