When installing and running multiple version of Actian DataConnect on the same system, it is very important to not have the following in the system variables:

Instead, use a .bat file to set the paths that are specific to the environment where you are trying to run Actian DataConnect. For example, if you are running v11.1.1 and v11.4 on the same system, then make sure you launch Actian DataConnect through the installed .bat files. Also, make sure that the variables set in the .bat file are not contradicted by the same settings in the system environment.