RefitTrim can return an error message which can be confusing or misleading to most users who are not familar with the language used by Rhino developers.
Try using RefitTrim on a trimmed edge which is adjacent to another trimmed edge, such as the surface on the right in the example below, and the response is “Selected Brep can only have one face”. This is confusing. “Face” usually is understood by Rhino users to mean a surface/polysurface face, not a trimmed edge of a surface. And most Rhino users are unfamilar with the term “Brep”. The message says nothing about trimmed edges. Post by a user who did not understand this error message: RefitTrim problem
The error message should say something like “Selected edge does not meet requirements”.
Example (not the example linked above): Untrimmed surface is on the left and trimmed surface is on the right.
RefitTrimErrorMessageExample.3dm (2.0 MB)
RefitTrim
Select a trimmed surface edge ( DeleteInput=No CreateBeziers=No )
Select one of the trimmed surfaces.
Enter
Selected Brep can only have one face.
