You open a member block component from within the flow chart of the business rule or template in which it is used. You cannot open it from the System View.
To open a member block component:
In the System View, expand the Planning or Essbase application type, the application, and the plan type (for Planning), or the database (for Essbase). Then do one of these, depending on whether the member block is in a rule or a template:
If the member block is in a rule, expand Rules, right-click the rule that you want to open, and select Open.
If the member block is in a template, expand Templates, right-click the template that you want to open, and select Open.
When the rule or template opens, select the member block component in the flow chart to see the member block properties.