I am having continuous problems with this error in my excel 2013 data model workbooks. I have not found any specific action i'm taking that causes it. I often have 2 workbooks open linked to different data models. The symptoms are:
1. Quite often the powerpivot tab just disappears form the toolbar and I have to go to options/addin uncheck powerivot, close and recheck to make it appear
2. I open a workbook, make some changes, hit save and nothing happens. I go to save as and select a folder and it wont open the folder. I have to close and lose the work and this error pops up.
I dont know if this is related, but in Excel 2010 i can open 2 processes and they run completely independently i.e. if one is doing a big calcualtion I can work on the other one. in Excel 2013 the 2 processes lock each other up i.e. I cannot work on the 2nd process if the 1st one is doing a data model calculation. Is the system only capable of supporting one data model at a time which is why I get the error?
I've posted here as no idea if this is a general excel problem or related to the data model (with which i have had enormous problems)
Thanks for any advice
Mike