If you are operating several SolidWorks versions in parallel, please note the following:
All relevant interfaces must be installed
Before
starting the respective SolidWorks version the corresponding interface
must be activated by carrying out the file register.bat in the
respective sub-directory of the installation.
For example
the file is located under $CADENAS/iface/solidworks/2019_64.
-> If the registration was successful, you will receive a corresponding message.