How do I call a variable checkpoint name from Excel inside a Data Loop?

I have a keyword data loop that uses an Excel spreadsheet
to enter some data, do a region checkpoint, then return to a valid starting
state before looping. I’m using variables (data from Excel) to fill in the
data, but I can’t figure out how to call a Region Checkpoint by a filename
contained in the Excel file.

How can I use the Excel file to supply the name of the
region checkpoint?

TestComplete 8.2. Microsoft Office Excel 2007.

Many thanks,

Chuck