Excel files cannot be read directly from Aximmetry.

The simplest workaround is exporting the Excel sheet into a csv file.
In that file rows will be written in separate lines, while the individual cells will be separated by semicolons.
Based on that you can use the text handling modules of Aximmetry to access data.

Firstly add a .txt extension to your csv file in order to make it accessible from Aximmetry as a text file.
Drop the file into to compound and make the following connections:

The first Text Slice will select a specified line from the text, the second one select a specified semicolon-separated data from the line.

In order to access multiple data cells simply add any number of Text Slice pairs connected to the Text File module.

It's recommended to group the Text Slices into a compound:

This makes easier to access multiple cells.