Error: Nullable object must have a value

Scenario

You may get the following error message when linking entities in a group.
Error message
Nullable object must have a value

Cause

This error is caused when there are duplicate codes in the entity added to the group within its entity structure.

Solution

  1. Open the subsidiary that you want to add to the group.
  2. On the
    Summary
    tab, select
    Entity structure
    .
  3. In the
    Entity Structure
    folders pane:
    1. Select the folder icon that has the client's name, and make a note of the
      Code
      .
    2. Under the folder with the client's name, select the document with a page icon.
    3. If the
      Code
      for this document is the same as the
      Code
      you noted for the folder, add
      .1
      to the end of the document
      Code
      .
      note
      For example, if the folder
      Code
      was
      FOT
      and the document
      Code
      was also
      FOT
      , then you would need to change the document
      Code
      to
      FOT.1
      .