GH Python Guid Error

Grasshopper
1

I’m having a weird error in one of the Python components of the GH file I’m attaching to this. The component ‘Cluster’ is taking polygons and grouping them in sequence; the number in each group is determined by a number slider. The component ‘Single Cluster Algo’ then separates any polygon groupings that aren’t touching the rest of their group.

This feature is working perfectly fine if I have the number slider set to anything less than 9 it seems, but if I try inputting a larger number, I get this runtime error:
1. Solution exception: Parameter must be a Guid or a string representing a Guid

I’m not sure what this means or why I only get this error sometimes, and other times it works perfectly. Any help is greatly appreciated.

See the screenshots included for successful and unsuccessful outcomes.

Thanks!

Successful%20Outcome
Successful%20Outcome1455×686 130 KB
Unsuccessful%20Outcome
Unsuccessful%20Outcome1459×685 122 KB
Python%20Error
Python%20Error903×887 98.1 KB
Python Error.gh (801.6 KB)
Test.3dm (9.8 MB)

2

@jessyesterday,

the method rs.DuplicateMeshBorder returns a list of border polylines. So you’re passing a list of polylines to rs.ConvertCurveToPolyline which results in the error, it expects a single curve GUID.

btw. do not understand why you’re trying to convert polylines (mesh borders) to a polyline. There is nothing to convert. You might just remove line 26 and change line 25 and 27 to this:

mesh_borders = rs.DuplicateMeshBorder(mesh)
if mesh_borders:
    border.extend(mesh_borders)

_
c.

3

That solution seems to have done it! I’m not well-versed in Python, so this script is a combination of many different people helping me.

Thanks!