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Supporting Screens
you may realize that a recent change you made was a mistake and want to go back to a previous
version. Several versions will be preserved from the previous 24 hours, then one per day for the
last seven days, then one per week for the last month, then one per month for the last year, then
one per year before that. Note: WEAP will never automatically delete a version for which you
have given a comment. You may treat these versions as milestones. For example, once you
have finished entering and calibrating the Current Accounts for an area, you may create a version
with the comment "Current Accounts complete." As another example, suppose you had just
finished a study using WEAP and written a paper. You might want to create a milestone version,
with the comment "Data set corresponding to March 2013 paper."
Versions for the highlighted area are displayed in the bottom-right pane, along with the disk space
they occupy. The panel has its own toolbar containing five options:

Revert: This option lets you revert to the highlighted version of a data set. Use this
option with great care as it will overwrite the current version of your data set. The Revert
option is also available from the Main Menu: Area, Revert to Version.

Comment: allows you to add or edit a comment for the highlighted version. For
example, you may wish to mark versions made after important events such as project
milestones. Note: any version with a comment will NOT be automatically removed by
WEAP.

Delete: deletes the highlighted version.

Delete All: delete all versions for this area.

Email to... Use this option to send the highlighted version as an email attachment.
Note: this feature requires that you have a MAPI-compliant email system installed on
your PC, such as Microsoft Outlook or Mozilla Thunderbird.
Menu Option: Area: Manage Areas
9.2
Manage Scenarios
Use the Manage Scenarios screen, to create, delete, organize and set the properties of the
scenarios in an Area.
The tool bar at the top of the Scenario Manager lets you add, copy, delete and rename scenarios.
Click on Add ( ) to add a new scenario, immediately under the current scenario. Click on
Delete ( ) to delete a scenario. Bear in mind that deleting a scenario will also delete all data
associated with that scenario. Click on Copy ( ) to make a copy of a scenario with a different
name, and click on Rename to rename the scenario.
On the left side of the screen, the Area's scenarios are listed in a hierarchical tree showing the
main scenario inheritance structure. Scenario inheritance describes how each scenario inherits the
expressions from the scenarios above it in the hierarchy. For more information, refer to Scenario
Inheritance. Click on a scenario in the tree to edit it or to add a new scenario beneath it.
On the right of the screen, you can edit a scenario's inheritance and description. Use the is based
on selection box to change the scenario's "parent." For those branch/variable combinations in the
scenario for which no expression has been explicitly defined, a default expression is inherited
from one of its ancestor scenarios. First the parent is checked for an expression. If none is found,
then the parent's parent is searched. This continues until an expression is found, either in an
ancestor scenario or in the Current Accounts.
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