User-defined Interaction Variables

Interaction variables are a special type of user-defined variables. They must also be defined in the program declaration part. Interaction variables are used to give the GPP user control over specific behavior of the post-processor during each run.

Interaction variables are assigned a default value, specified when the variable is declared. The GPP user can modify the values of Interaction variables before each run.

Within the same GPP session, Interaction variables maintain their values from run to run. The values presented to the GPP user in each run are the last values assigned to these variables in the previous run. However, each time GPP is started, the default values will be presented to the user.

With GPP2, it is also possible to define system variables for user interaction. In particular, it is useful for system variables that are initialized from DF2 parameters. This allows the end user to override DF2 parameter values at runtime. See more details in the INTERACTION statement section.

Up to 50 Interaction variables can be defined in each GPP program (both user-defined and system variables).