Run time engine compatible issue

[YuanTao-TX]

We had a computer running LabVIEW executable in LabVIEW 2014 runtime engine.

Now we bought LabVIEW 2017 and LabVIEW 2017 run time engine. If I install 2017 run time engine on the computer we run executable, will those older executable running on 2014 run time engine still work??? (I dare not to try yet because I do not want the important working executable file stop working...)

[_Bryan]

Yes you can have multiple versions installed.  But like the link below says you have to watch out with driver compatibility.  You could also upgrade the older program to 2017 if that is an option.

Also look under the "Application Builder Enhancements" in the following link for new features in 2017  http://zone.ni.com/reference/en-XX/help/371361P-01/lvupgrade/labview_features/

https://knowledge.ni.com/KnowledgeArticleDetails?id=kA00Z000000kH9bSAE

Issue Details

Can I have two different versions of LabVIEW Run-Time Engine on the same systems without them interfering?

Solution

You can have multiple versions of the Run-Time Engines on a machine. 

However, keep in mind that if you have NI drivers (i.e. DAQmx API) you can't have more than one version of each driver installed at any point in time. This is important to keep in mind as different Real-Time Engines might not support the same versions of the driver (i.e. if the driver version is old and no longer supported in the new Real-Time Engine).

[crossrulz]

The RTEs are installed "side-by-side", ie they don't overwrite each other.  So, yes, the older executables can still run on the older RTE along with your new executables on teh new RTE.