Autodesk Inventor detects relationships that conflict with others or that cannot be solved. A relationship error does not harm or destroy geometry; it means that the two components cannot be connected in the way you have attempted. Autodesk Inventor notifies you when errors occur.
When a relationship has inconsistencies or cannot be solved, an error message explains the error, and the affected geometry highlights in the graphics window. You can edit relationships to resolve the error, accept the error, or use diagnostic tools to resolve the conflict. Relationships with errors are marked with symbols in the browser, where you can edit them later.
The following error symbols can display:
Recovery help is available - Click to use Design Doctor to take you through steps to resolve the error.
Lists tips for using recovery options - Click Help in the message window to read information about the Command Message dialog box.
Error condition - If you decide to accept a relationship error, the relationship is flagged with this symbol in the browser.
Information about the attempted relationship is available - If multiple problems are found, you can expand and collapse the message hierarchy while you evaluate the required actions.
Display and edit relationship errors in the graphics window
Use Free Move to separate the components. An elastic band shows the component joints. The relationship and error glyphs are visible on the component body. 
Use Show relationships to display the relationship and error glyphs on a component. If you want to show relationships on multiple components, select the components before you select the command. 
Use Show Sick to display error glyphs on components that have a relationship error. If there are no relationship errors in the model, the Show Sick command is not available.
Use the glyph context menu to suppress, unsuppress, or delete a relationship.
Use Hide All to remove all relationship and error glyphs from the display. Create/Edit Joint error options
Inventor displays the Create/Edit Joint error dialog box when an error occurs while you place or edit a relationship. This dialog box has four options for handling the error:
- Edit the relationship The dialog box displays so you can change the relationship.
- Cancel the operation The command is canceled. If you are creating a relationship, the relationship is deleted. If you are editing a relationship, the relationship is restored to its previous state.
- Accept the relationship The relationship displays in the browser with an error symbol. The relationship does not affect component position or behavior. It retains the selections so you can edit it later.
- Diagnose the relationship The Relationship Conflict Analysis dialog box displays. This dialog box lists a minimal set of the components that contribute to the conflict. A conflict, which can be viewed as a minimal set of relationships that cannot coexist with each other, can then be identified within the dialog box. You can temporarily break relationships or change grounded status of components to test solutions and solve the conflict. You can then delete or suppress the broken relationships.
Assemble and Grip Snap relationship conflicts
Inventor displays the Relationships Management dialog box when a conflict occurs when using Grip Snap or Assemble. This dialog box displays a list of the conflicting relationships.
- Click a relationship to highlight it in the graphics window.
- Select Suppress Relationships or Delete Relationships.
- Click OK to suppress or delete the relationships or Cancel to exit without creating the relationship.