Excel error when updating a workbook.
 

I get an error message when I click 'Yes' to update the links in a Workbook...

Excel cannot complete this task with available resources. Choose less data
or close other applications.

The error is produced from a series of VLOOKUPs I am using, but I do not
have that many and it's looking at another Excel Workbook.

Any ideas why I get this and what, if anything I can do to get rid of it??

TIA.