If you do not get basic knowledge on instances, you can learn more on:

• Introduction to instances‍ 

Sometimes, for complex models with lots of instances in each workbook, calculations can take time. One of the solutions to improve calculation time is to regroup instances with the flag /InstanceSelect. By regrouping instances into groups, you will be able to handle calculations in your model only with a specified group of instances.

In the main workbook, you should first create an Instancekey grid that defines instances in each workbook and its links with instances from other workbooks (more about Instancekey table in Introduction to instances).

To define groups with instances and find dependencies between instances, you should add a column with columnname + /InstanceSelect as the header of this last column. Then, you can gather instances by choosing in this last column a group name for each row. To find dependencies inside your group, you have to read your Instancekey grid as if your group is a key: you must find in each workbook instances that are linked to your group key directly or not (it could be an instance linked to another instance which is linked to your group).

In the above grid, the last column is named Groups. You can notice three different groups in the grid (Group1, Group2, and Group3). In blue, you can distinguish the instances linked to Group2. Indeed, Group 2 contains PS2 from ProfitSharing file, TREATY02-SEC1, TREATY03-SEC2, and TREATY03-SEC3 from TreatySection file, TREATY02 and TREATY03 from Treaty file. You can notice here that TREATY02 and TREATY02-SEC1 are instances that are not directly linked to Group2 but are fully included in it.

If Group2 is chosen in Mind, calculations will only take into account instances (in blue here) from Group 2.

Display instances from a group in Mind

Classic visualization mode

In the classic mode, click on the second button here in yellow. Then, you will see the last column header of your InstanceKey grid (Groups here) and, in the drop-down list, the groups you created previously in your InstanceKeys grid:

Then, click on the right blue button and you will browse all instances linked to the group you choose.

Workflow mode

On top of the screen (in blue in this picture), select the button named as the header from the last column of your InstanceKey grid (in this example, it is "Groups"). Then, you can see, as in classic mode, the drop-down list with different groups you have created.

Just select the group you want to display than all the grids will be refreshed, the model will take into account only instances from the group chosen. This choice is also kept when you change steps.

Manage comments to your Group name

In your Instancekey grid, if you want to add a comment to the header of the column containing groups allocation, you have to right-click to the header cell and add commentary:

Here, a yellow box is created with the commentary "Please select a group".

In Mind, after clicking to the button named as the header from the last column of your InstanceKey grid, you will see the name you fixed to your header column (here the name "Groups") and just below the commentary "Please select a group".

Multiple users on the same /InstanceSelect group

From now on, a new setting is available in the Project Settings to allow several users to open the same Instance group at the same time. To activate it, go to the settings and enable this option: Multi-users partial load :