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When you try to add allocation forms to some cut, you cannot do it and get the message:

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Or (for already normalized forms):

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Reason

Cuts, not belonging to the "Base Cuts" category, usually have a limited set of parameters. For some of them, the  Goodwind  cut engine is applied which extends the set of parameters - adds slopes. Thus, you can control more parameters for these cuts. 

There are some limitations to such cuts:

• "4+ facets" limitation:

  • "4+" facet is a facet with 4 or more vertexes (junctions are the most common reason for the triangle facets to become "4+").
    

  • Goodwin

  only accepts when 3 facets with 4+ vertexes converge at one vertex - more than 3 facets of such type are not accepted.
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  Note Facets with 3 vertexes do not cause limitations.
  

  • checks every vertex of the model.
    

  • At each vertex, only 3 or fewer "4+" facets should converge.
    

    Note
    Table, culet, and facets of the girdle are not taken into account.

    See the Example below.

    
    

• Facet types should not have serious errors (like some of the facets on the pavilion marked as the crown facets)Facet types should be correct.

How to solve

1. To solve the 4+ vertexes problem, try running Smart Normalize. If this does not help:
2. Check facet types of your model.

Example

Here is an example: