Each process has a specific set of allowed input parameters. All of them have default values, which can be changed by the user at run time, when running interactively, or via an input file. To list the parameters and the default values, run the executable interactively with imode=3 (to print on the screen) or 4 (to print them on a file). For example, working with wjet processes, issue the command:

> ./wjetgen

and input 3 or 4. After printing the parameters, the code will stop. You can then decide which of the default parameters you may want to change, and prepare your input file for a real run accordingly. More details on the meaning and use of the parameters is given in the documentation