Hello @renobozo,

thank you for reaching out to us and welcome to the Plugin Café. We cannot reproduce your problem here on our machines. Your error indicates that c4d.DESC_CYCLE is not an integer on your machine as it should be, but a set. Could you print out the value of c4d.DESC_CYCLE? You might have accidently overwritten the value, but should have been fiexed by a restart.

Cheers,
Ferdinand

The result:
9db9d4e6-6da1-4bfe-822e-f51e37df6779-image.png
The script:

"""Simple example that does create cycle user data parameters in the selected object. The cycle values are populated with the names of the children of the selected object. To be run as a script manger script. Requires an object to be selected which should have some children. """ import c4d def CreateUserData(node: c4d.BaseList2D): """Creates a user data parameter in #node. """ param = c4d.GetCustomDataTypeDefault(c4d.DTYPE_LONG) param.SetString(c4d.DESC_NAME, 'Objects') param.SetInt32(c4d.DESC_CUSTOMGUI, c4d.CUSTOMGUI_CYCLE) cycle = c4d.BaseContainer() # I assume you wanted to populate the cycle with the children. for i, child in enumerate(node.GetChildren()): cycle.SetString(i, child.GetName()) param.SetContainer(c4d.DESC_CYCLE, cycle) # You have to pass either a collection type or DescId for the parameter id here. if not node.SetUserDataContainer((c4d.ID_USERDATA, 1), param): raise RuntimeError("Could not set user data parameter.") did = c4d.DescID(c4d.DescLevel(c4d.ID_USERDATA), c4d.DescLevel(2)) if not node.SetUserDataContainer(did, param): raise RuntimeError("Could not set user data parameter.") def main(): """Entry point. """ if op is None: raise RuntimeError("Please select an object.") CreateUserData(op) c4d.EventAdd() if __name__ == '__main__': main()

Where to report a bug?