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Calling up the Variables Screen 
This command allows you to call up the variables screen again for the current page. In the variables screen, you are able to change the values of the variables that have been used so far.
You can also transfer new values over, as described in Default Variables for Web Applications. Along with the values already set, these new values are used as the default values in the variables screen.
If the variables screen appears when you call up a Web application, you have to adjust the Web template call (see Calling Web Templates ® Standard Call).

You are not able to add filter parameters to the Call Variables Screen command.
|
CMD |
PROCESS_VARIABLES |
|
SUBCMD |
VARIABLE_SCREEN |

<SAP_BW_URL CMD='PROCESS_VARIABLES' SUBCMD='VARIABLE_SCREEN'>