It is possible to have multiple versions of TestStand installed in parallel. However, only one version of TestStand can be active and running at any given time.
You can select the version you wish to run by making it active in the TestStand Version Selector
Note: If you have TestStand 32-bit and 64-bit installed with the same year version, ensure they also are on the same minor version. For example, you can install TestStand 2017 32-bit and TestStand 2017 64-bit, or TestStand 2017 SP1 32-bit and TestStand 2017 SP1 64-bit, but not TestStand 2017 SP1 32-bit and TestStand 2017 64-bit or TestStand 2017 32-bit and TestStand 2017 SP1 64-bit.
You can launch TestStand Version Selector in the following ways:
- Windows 10 and 7: Use the start menu: Start»All Programs»National Instruments»TestStand»TestStand Version Selector.
- Windows 8 and 8.1: Click the NI Launcher tile on the Start screen and select TestStand»TestStand Version Selector.
- Run C:\<Program Files x86>\National Instruments\Shared\TestStand Version Selector\TSVerSelect.exe.
The error message shown in the Issue Details section above can be fixed by opening TestStand Version Selector and making the desired version active. The error message results from attempting to open a version of TestStand that is not currently active. The error message shows which version is currently active and which version you are trying to open. In the case depicted above, we are trying to open TestStand 17.0.0 while Teststand 4.2.1 is marked as active.