Hello. This issue could be caused by a disconnect between JMP and Excel. Let's try repairing that link. Within JMP, click File -> Preferences -> Windows Specific and click "Reset Associations" at the bottom of the screen.
Now open the Excel file and try to transfer the data to JMP.
I have attached my output from the Excel Addin Trial Run using the Demand.xls file included with JMP 13. I got JMP to run, but as you can see; it didn't give me any output. I show the Excel file in JMP and the output from the Run Command. Any help would be appreciated. Thank you, Joe