Import and synchronize Occurrences

When Items are established and linked between dRofus and IFC, Occurrences can be imported and synchronized.

Before importing and synchronizing occurrences, we recommend reading the following: Using IFC GUID in the Occurrence configuration

To import or synchronize occurrences:

1. Select Item(s) that need to be synchronized

2. Go to BIM → Occurrences → Synchronize with model.

This will open a new window ;

1. Use a filter to synchronize occurrences for selected Items or all linked Items in dRofus

2. Import/Update Occurrences. This option cannot be turned off.

3. Update occurrences. This option cannot be turned off.

4. Delete unlinked Occurrences. This function deletes occurrences in dRofus that do not have a matching instance in the IFC, according to the Occurrence → IFC Occurrences configuration.

5. Move occurrences to this model.

6. Import systems. Imports systems and system memberships for Occurrences.

When starting the sync operation, the preview will show how many occurrences will be created and deleted (if Delete unlinked Occurrences are selected). The sync can be canceled if needed before proceeding with the actual sync.

The above image shows that 38 occurrences will be created in dRofus. The result in the Occurrences pane looks like this;

The synchronization has now been conducted according to the synchronization options and the active Occurrence <-> IFC Occurrence attribute configuration.

If the IFC model contains IFC spaces linked with the rooms in dRofus, according to the Room <-> IFC Room configuration, the sync operation will place the occurrences in the linked rooms' Items list. In the image above, the imported occurrences have been assigned a room relation in the first column. There are some prerequisites in the IFC model for connecting occurrences to rooms to work.

Rules for connecting occurrences from IFC to room equipment lists in dRofus:

1. The IFC model used for importing / syncing occurrences must contain IFCSpaces linked to the rooms in dRofus.

2. The Objects in the IFC file must be related to the IFC Space, not only to the IFC Story or IFC Building.

3. The equipment list for the room must have the following statuses to connect the occurrence to the room equipment list;

   1. Not created

   2. Unique

   3. Derived

Rooms with equipment lists from a room or equipment template will not be updated from IFC. The occurrences will need to be connected manually after import.