Is it possible to store lookup data in a .xlt template file and access the
sheet from with the VBA code stored in the .xlt file itself?

I created a .xlt template with one worksheet and a toolbar with one button.
This template contains data along with some macros that reference that data.
Unfortunately, the macro ends with an error when run from a workbook without
the referenced worksheet. Is it possible to reference the worksheet
contained within the .xlt template?