When you add a force plate in Nexus, you are also required to install the Calibration File into the appropriate dialogue box. The Calibration file generally comes with the device from the manufacturer. This can be a .Plt file or an .acl file for AMTI plates.

There may be occasion when the file located does not populate the drop down box on selection within Nexus.

In this instance, you may need to hand edit the file to remove any white space or extra characters, such as Commas and Carriage returns, in order for it to be read by Nexus.

Open the file in a text editor, and remove any white space and/or extra characters not required.