You can define the number of variables that you
can set [Retentive]. From the [System Settings] window open [Logic
Programs], and then click [Retentive Area Settings] to open the
[Retentive Settings] dialog box.
30.14.1 Logic Program Settings
Guide
You can check the Retentive/Volatile settings.
From the [File] menu, point to [Information] and click [Project
Information]. In the dialog box, select [Memory Usage], click the
[Logic] tab, and in the [Variable Capacity] area click
[Details].