Active Validation instantly checks the accuracy, completeness, and correctness of a model, displays errors in the model, and suggests solutions.
There are two active validation rules for links:
Instance Specification type mismatch
The Instance Specification type mismatch validation rule allows for updating slot values when referenced association end types are incompatible with connected instance specification types.
Missing slots in links
The Missing slots on links validation rule are more useful than migrating projects from the MagicDraw 17.0.2 version or earlier. The validation rule detects links that have related associations but do not have slots created in them. For each incorrect link, the warning is displayed. To resolve the warning, there is the Create slots for this link resolution action. After choosing that action, slots are created in the link.
The validation rule is available only if the Automatically Create Slots in Link option is set to true in the Environment Options dialog.