Revit: Modifying is forbidden because the document

Question

Modifying is forbidden because the document has no open transaction. The document has no open transaction. In Revit Document.

Answer 1

You have 2 options:

1. change the TransactionMode to Automatic at the class attribute

   [Transaction(TransactionMode.Automatic)]

2. open a transaction within your command

   Transaction tr = new Transaction(commandData.Application.ActiveUIDocument.Document); tr.Start("Command name here");

   // your code

   tr.Commit();

Answer 2

close streamreader function

Dim TextLine As String = ""
    Dim fs As FileStream = New FileStream("baglanti.ini", FileMode.Open)
    Dim sr As StreamReader = New StreamReader(fs)
    baglanti_kodu = sr.ReadLine()
    fs.Close()
    sr.Close()  <---- they

Answer 3

Since you tagged this as revitpythonshell:

try:
    transaction = Transaction(doc, 'a name for your transaction)
    transaction.Start()
    do_stuff_that_needs_to_modify_document()
    transaction.Commit()
except:
    transaction.Rollback()
    throw_hands_up_in_the_air_and_cry_in_frustration()