One structural beam is too long

You can manually unjoin all the wrong beams or give a try with this python script, that will unjoin all the selected beams (you need to use a SelectModelElements as input):

import clr

clr.AddReference('RevitAPI')
from Autodesk.Revit.DB import *
from Autodesk.Revit.DB.Structure import *

clr.AddReference('RevitAPIUI')
from Autodesk.Revit.UI import *

clr.AddReference('System')
from System.Collections.Generic import List

clr.AddReference('RevitNodes')
import Revit
clr.ImportExtensions(Revit.GeometryConversion)
clr.ImportExtensions(Revit.Elements)

clr.AddReference('RevitServices')
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager

doc = DocumentManager.Instance.CurrentDBDocument
uidoc=DocumentManager.Instance.CurrentUIApplication.ActiveUIDocument

#Preparing input from dynamo to revit
element = UnwrapElement(IN[0])

#Do some action in a Transaction
TransactionManager.Instance.EnsureInTransaction(doc)

for x in element:
	StructuralFramingUtils.DisallowJoinAtEnd(x,0)
	StructuralFramingUtils.DisallowJoinAtEnd(x,1)

TransactionManager.Instance.TransactionTaskDone()

OUT = element

Give a try and let me know :wink:

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