Android Question B4A ver 5 error message

Discussion in 'Android Questions' started by pevguitars, Jun 16, 2015.

  1. pevguitars

    pevguitars Member Licensed User

    With B4A Version 5 (in all my projects) I am getting the following error message dialog when I try to compile with F10

    "An error occurred. Object reference not set to an instance of an object"

    There is nothing in the log and no code highlight to tell me what is wrong.

    Compiling with F11 or Alt3 works fine and the resulting programs are error free.

    I would like to understand what is happening...

    Peter V
  2. Erel

    Erel Administrator Staff Member Licensed User

  3. pevguitars

    pevguitars Member Licensed User


    Thank you for your very quick reply.

    I have logged the B4A attempt to compile one of my projects using F10...

    The result is attached..

    Peter V

    Attached Files:

    • log.txt
      File size:
      4 KB
  4. SteveTerrell

    SteveTerrell Active Member Licensed User

    I had that with the "If Not(up) Then" line in

    Sub CheckScreenOrientation(up As Boolean)
    Dim ph As Phone
        If globalInvertOnReturn Then
    If Not(up) Then
    If lastO = 8 Then
                    lastO = 
    End If
    If lastO = 0 Then
                    lastO = 
    End If
    End If
    End If
    End Sub

    I changed it to

    If up = False Then
    All ok, then back to Not(up) and then ok as well?

    Initially I had to gradually eliminate all other code in the sub until only the If line was left and still had the error report (from the background compilation).
    No such error previously with B4A V4.
    Peter Simpson likes this.
  5. pevguitars

    pevguitars Member Licensed User

    Thank you Steve. Yes I use booleans directly as an If bool Then test.. a habit from my Delphi Coding. I will try what you suggest.

    Later Edit : No it's not that in my case

    Peter V
  6. SteveTerrell

    SteveTerrell Active Member Licensed User

    It certainly ought to be something else! It is a most unhelpful error message.

    I commented everything out of the sub almost line by line until the fault report disappeared then took the comment off the last line i changed and started commenting around it. That is how i ended up with just the If line (and its End If) with the fault still there. Then i experimented with what was in the If.

    Quicker to do on a short sub! but it may be a way of getting you on the move again.
  7. Erel

    Erel Administrator Staff Member Licensed User

    F10 is the shortcut for Step Out. It is not a shortcut for compiling your program. You need to use F5 or one of the other options to compile and run your app.
  8. SteveTerrell

    SteveTerrell Active Member Licensed User

    In my case the error message appeared and disappeared in the top of the logs window while i was editing.
  9. pevguitars

    pevguitars Member Licensed User

    Thank you Erel.

    F5 works perfectly.

    A word or two to thank you for your new version of B4A. Your new editor is really good. The upgraded auto-complete feature takes a little getting used to but, once in the rhythm of it, code writing is much faster. The highlighting of matching brackets and if-then and end-if is also a great time saver. I also like the line parsing feature that Steve mentioned above. Great work on your part...

    Peter V
    Erel likes this.
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