The issue is probably a conflict with the new version of DataMate and the calculator operating system (OS). Your calculator needs to be running the newest operating system, otherwise you will get a link error. You can check the calculator’s OS by pressing [2nd],MEM on the calculator and selecting About. Your calculator will need OS version 1.15 or newer. If you have an older OS, you can download the newest OS from the TI web site at

http://education.ti.com/us/product/apps/83pos.html

Check the calculator OS, and if necessary update the calculator.