Can the same Spotfire Statistics Services (TSSS) instance be configured to use both TIBCO Enterprise Runtime for R (TERR) and open-source R?

Can the same Spotfire Statistics Services (TSSS) instance be configured to use both TIBCO Enterprise Runtime for R (TERR) and open-source R?

Can the same Spotfire Statistics Services (TSSS) instance be configured to use both TIBCO Enterprise Runtime for R (TERR) and open-source R?
  No. Each TSSS instance runs exactly one type of statistical engine (such as TERR, open-source R, S+, Matlab or SAS). You can install and run multiple standalone TSSS instances on the same server, however, as long as each instance uses its own distinct URL and service name, listens on its own pair of ports, and defines its own location for temporary files.