Edit Losses

Edit losses occur when you edit a constraint, such as MODGEN or an object that has been created in an imported peer partition. Warnings are displayed in the assistant and a message box displays asking you to undo the changes because they can result in edit loss.

If you ignore the warning and save without undoing the edits, the edited object might be in an inconsistent state due to data loss. The following image shows MODGEN inconsistency due to data loss:

You can work around this issue by editing constraints and objects imported from peer partitions in full partition view. Although edits are lost when you create a design partition view, the geometries are retained.

Edit Conflict

Editing in Concurrent Layout is done offline, therefore the manager or designer might edit the same object leading to the edit conflict. The assistant immediately shows an alert and cross-highlights it in canvas.

Edit conflicts can cause issues during the merge or import process because when two changes conflict, only one can be considered and the other is lost.

You can do the following to prevent or resolve edit conflicts:

• Partition the design carefully and if an edit conflict is detected at runtime, undo the reported change.
• Edit conflicts can lead to name conflicts because the two objects are given the same name. OpenAccess accepts only unique names, therefore after open, a temporary name with a marker is given to one of the conflicting objects. The user needs to manually rename it.

Warnings

Concurrent Layout does not stop you from editing outside the current design partition. This is because most SKILL scripts and commands are not partition-aware. However, a warning is displayed to inform you that you are editing outside the partition. It is important to avoid such edits because they can cause edit conflicts when you try to merge or import the current design partition.

Warning is not displayed when:

• Two partitions overlap and you are editing inside the overlap because it is still compliant.
• A partition has mixed types and all the requirements of concurrent editing are met.
• AppDef, marker, or property changes are done.

If all partitions are object-based partitions, each partition contains an exclusive object ownership for a designer to edit  or delete objects. Therefore, the designer who creates an object also owns it. These objects are enclosed by a figure group and can be edited by using the edit-in-group (EIG) option.

If you do not want to remove edits for objects you do not own, select the Filter changes for objects not owned option in the Concurrent Layout Options Form form.