If you look closely at the variable table, there is a column named Value.
At the right side of the variables that are dimensions, there is a lock tab.
This must be selected, and show locked in order to drive the dims via an excel worksheet.
Then, click on the cell in the excel worksheet that has the value you wish to drive a variable with and select copy.
Move back to the variable table, and right click on the formula cell for the variable you wish to drive, and select paste link.
I use it in history based quite a bit, and just tried it in syncronous, and it worked fine.
-av8errr
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