Creo Simulate > Modeling Structure and Thermal Problems > Measures > Measure Basics > Guidelines for Measures
  
Guidelines for Measures
You cannot use the same name for both a measure and a parameter.
You cannot create a new measure that is identical to a predefined measure, unless you associate the measure with a UCS.
If you delete any entity associated with a local measure, Creo Simulate automatically deletes the measure even if other entities are still associated.
You cannot delete a predefined measure or use the name of a predefined measure for a custom measure.
If a measure is evaluated at any geometrically singular location in the model, the value of the measure can be inaccurate. Creo Simulate displays the measure name with an asterisk in the summary report of an analysis.
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