Instrument I/O Assistant in LabVIEW showing error?

If the instrument I/O Assistant driver in LabVIEW not showing error, then follow the steps:

Step 1: Uninstall NI-VISA driver from the computer.

Step 2: Uninstall NI-488.2 driver from the computer.

Step 3: Uninstall instrument I/O Assistant driver.

and reinstall all three.
It will solve the problem.

NOTE: The instrument I/O Assistant driver is included in NI-VISA driver package. Make sure you select instrument I/O Assistant driver while reinstalling NI-VISA driver.

The following link might be helpful:

http://forums.ni.com/t5/LabVIEW/Install-Instrument-I-O-Assistant/td-p/1471516

http://www.ni.com/tutorial/4554/en/

http://www.ni.com/download/ni-visa-15.0.1/5693/en/

http://www.ni.com/download/ni-488.2-14.0/4802/en/