|int||GRBemptyenv (||GRBenv||**envP )|
Create an empty environment. Note that you will need to call GRBstartenv before you can use this environment.
You should use this routine if you want to set parameters before actually starting the environment. This can be useful if you want to connect to a Compute Server, a token server, or the Gurobi Instant Cloud. See the Empty Environment Section for more details.
A non-zero return value indicates that there was a problem creating the environment. Refer to the Error Code table for a list of possible return values.
envP: The location in which the pointer to the newly created environment should be placed.