What makes this case different from the base? It worked yesterday, what’s changed? Why don’t we get the same answer? I have previously written about how the GRTMPS compare tool can be used to identify differences between spreadsheets that contain OMNI format input tables. Here's a tool included in MS Office 2016 that can identify the differences betweeen any pair of Excel workbooks, to help you when you have spreadsheets containing other data formats.