Debugging in autocad VBA ide is not displaying where the error is - vba

Question

Whenever i am trying to debug or run the program and if it encounters error, the VBE (Autocad) doesn't display the line where the error is, unlike in other IDEs, it used to come at that line and highlight with yellow color. Also, the scroll doesn't work. I know i should install plugins but i am unable to help myself.
Option Explicit
Sub Test()
'Declarations
'Opened Document
Dim acDocu As AcadDocument
Set acDocu = ThisDrawing.Application.ActiveDocument
'Select on screen
Dim acSelectionSet As AcadSelectionSet
Set acSelectionSet = ThisDrawing.SelectionSets.Add("SjjEffffT")
acSelectionSet.SelectOnScreen
'Manipulating in loops for finding group names having objects selected
Dim entity As AcadEntity
Dim entityhandle() As String
Dim Grp As AcadGroup
Dim groupname() As String
Dim i As Integer
i = 0
Dim j As Integer
j = 0
Dim temp As Integer
temp = 0
Dim GrpEnt As AcadEntity
Dim grpenthandle As String
Dim entity_count As Integer
'Dim entity_array As Variant
entity_count = acSelectionSet.Count
ReDim entityhandle(entity_count)
ReDim groupname(entity_count)
For Each entity In acSelectionSet
'entity_array = entity
entityhandle(i) = entity.Handle
For Each Grp In ThisDrawing.groups
For Each GrpEnt In Grp
grpenthandle = GrpEnt.Handle
If entityhandle(i) = grpenthandle Then
If temp = 0 Then
groupname(j) = Grp.Name
Debug.Print "Group in selection:" & groupname(j)
j = j + 1
End If
End If
temp = temp + 1
Next
temp = 0
Next
i = i + 1
Next
'Copying the objects and pasting into new drawing
Dim acDocto As AcadDocument
Dim file_name As String
'file_name = InputBox("Enter the file name along with full path and extension")
file_name = "D:\PI_Tool_files_3223\D00440023new.DWG"
Set acDocto = Documents.Open(file_name)
Dim acObject As AcadObject
Dim retvalue As Variant
retvalue = acDocu.CopyObjects(entityhandle, acDocto.ModelSpace)
acSelectionSet.Delete
End Sub
The code is written above. But i think the problem is with the add-in as i can't debug.

Answer 1

The VBA IDE is pretty old (1998) and it has limited debugging abilities. You should stop using this, it's an obsolete technology, not actively supported by Microsoft/Autodesk anymore.
For some errors, it is not able to locate the line where the error occurred, and you're left with obscure error codes and useless messages.

Answer 2

Have you tried setting a breakpoint at the first possible line? (Set acDocu = ThisDrawing.Application.ActiveDocument)
Then step through to see the offending object/property/method.
It doesn't always work.

Answer 3

Can you load the code into a module, instead of "ThisDrawing", then debug?