Application Crash with no Exception Thrown

[JosePat]

Good day,

My program is crashing and no exception is being thrown,

I get this message:

Unhandled exception at 0x56e25468 (tiptsf.dll) in Stock Monitor CONS.exe: 0xC0000005: Access violation writing location 0x769248d1.

Dissassembly: 56E25468 mov dword ptr [eax+8],ebx

I believe it has to do with this symbol:

tiptsf.dll C:\Program Files (x86)\Common Files\Microsoft Shared\Ink\tiptsf.dll N/A N/A Symbols loaded (source information stripped). C:\Users\xxx\Documents\SymbolCache\tiptsf.pdb\35FBF03EC4314EE7A4CA9389BCDE8D192\tiptsf.pdb 99 6.2.9200.16384 (win8_rtm.120725-1247) 7/26/2012 1:41 AM 56E20000-56E89000 [8896] Stock Monitor CONS.exe: Native

Im not sure why this symbol module is required in the first place, from what I looked up tiptsf.dll has to do with windows tablet or something like that.

Any help on the issue ? I've scoured the web for the past five days but no one comes close to solving the issue.


---


Sorry I added code but forum moderation prevented me from posting a second message.

The following leave event causes the crash to occur, only after I've clicked btn_StockOnJobs(click event)

So I'll click btn_StockOnJobs:

 Private Sub btn_StockOnJobs_Click(sender As Object, e As EventArgs) Handles btn_StockOnJobs.Click
'Populate datagridview from db
        Try
            'DataGridView1.DataSource.Clear()
            Dim connectionString As String
            'Dim connection As OleDbConnection
            Dim ds_stockonjobs As New DataSet
            Dim sql As String
            connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\xxx\Documents\Stock Management CONS\CONSdb1.accdb"
            Using connection = New OleDbConnection(connectionString)
                sql = "SELECT StockOnJobs.JobNumber,StockOnJobs.Warehouse, StockOnJobs.StockCode, StockCodes.Description, StockOnJobs.Quantity, StockOnJobs.DateIssued" &
                     " FROM StockOnJobs" &
                     " INNER JOIN StockCodes ON" &
                     " StockOnJobs.StockCode = StockCodes.StockCode"

                connection.Open()
                Using oledbAdapter = New OleDbDataAdapter(sql, connectionString)
                    If connection.State <> ConnectionState.Closed Then
                        connection.Close()
                    End If

                    oledbAdapter.Fill(ds_stockonjobs)
                End Using
            End Using
            DataGridView1.DataSource = ds_stockonjobs.Tables(0)
            DataGridView1.AutoGenerateColumns = True

        Catch ex As Exception
            MsgBox(ex.Message)
        Finally
            MsgBox("test")
        End Try


    End Sub

Then I'll open up a new form with this button:

 Private Sub btn_IssueStock_Click(sender As Object, e As EventArgs) Handles btn_IssueStock.Click
        Try
            Dim frm_IssueStock As New frm_IssueStock
            frm_IssueStock.ShowDialog()
            frm_IssueStock.Focus()

        Catch ex As Exception
            MsgBox(ex.Message)
        Finally
            MsgBox("test")
        End Try

    End Sub

Once the new form is open I've a txt_JobNumber_Leave event that checks to see if the value within txt_JobNumber exists in the DB and if it does then populate the datagridview in the new form.

 Private Sub txt_JobNumber_Leave(sender As Object, e As EventArgs) Handles txt_JobNumber.Leave
        Try
            verify_Job_Number_Exists()
            refresh_Grid()
        Catch ex As Exception
            MsgBox(ex.Message)
        Finally
            MsgBox("Job Number Entered")
        End Try

    End Sub

verify_Job_Number_Exists()

 Private Sub verify_Job_Number_Exists()

        Try
            Dim commandText = "SELECT JobNumber FROM StockOnJobs"
            If Len(txt_JobNumber.Text) >= 8 Then
                Dim connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\xxx\Documents\Stock Management CONS\CONSdb1.accdb"
                Using connection = New OleDbConnection(connectionString)
                    Using sel = New OleDbCommand(commandText, connection)
                        Try
                            connection.Open()

                            Try
                                Dim count As String = sel.ExecuteScalar
                                If count = "" Then
                                    JobNum_Exists = 0
                                Else
                                    JobNum_Exists = 1

                                End If
                            Catch Ex As InvalidOperationException
                                MsgBox(Ex.Message)
                            Catch ex As FormatException
                                MsgBox(ex.Message)
                            Catch ex As InvalidCastException
                                MsgBox(ex.Message)
                            Catch ex As OverflowException
                                MsgBox(ex.Message)
                            End Try
                        Catch ex As OleDbException
                            MsgBox(ex.Message)
                        Catch ex As InvalidOperationException
                            MsgBox(ex.Message)
                        End Try
                    End Using
                    If connection.State <> ConnectionState.Closed Then
                        connection.Close()
                    End If
                End Using
            End If



        Catch Ex As OleDbException
            MsgBox(Ex.Message)
        Finally
            MsgBox("test")
        End Try

    End Sub

refresh_Grid()

  Private Sub refresh_Grid()
        Try
            If txt_JobNumber.Text = "" Then
                End
            Else

                If JobNum_Exists = 1 Then
                    txt_JobNumber.Enabled = False

                    Dim connectionString As String

                    Dim ds As New DataSet
                    Dim sql As String
                    connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\xxx\Documents\Stock Management CONS\CONSdb1.accdb"
                    Using connection = New OleDbConnection(connectionString)
                        ' sql = "SELECT * FROM StockOnJobs WHERE JobNumber = @JobNumber"
                        sql = "SELECT * FROM StockOnJobs WHERE JobNumber = '" & txt_JobNumber.Text & "'"
                        'Using sel = New OleDbCommand(sql, connection)
                        connection.Open()
                        'sel.Parameters.Add("@JobNumber", txt_JobNumber.Text)
                        Using oledbAdapter = New OleDbDataAdapter(sql, connectionString)


                            oledbAdapter.Fill(ds)
                            lbl_Noti.DataSource = ds.Tables(0)
                            lbl_Noti.AutoGenerateColumns = True
                            'End Using
                            If connection.State <> ConnectionState.Closed Then
                                connection.Close()
                            End If

                        End Using
                        ds.Dispose()
                    End Using

                    'Default Column Width

                    'dgv_JobStock.Columns("CurrentPrice").Width = "70"


                    'Minimum Width
                    'dgv_JobStock.Columns("CurrentPrice").MinimumWidth = "70"

                End If
            End If
            'See if Job Number exists


        Catch ex As Exception
            MsgBox(ex.Message)
        Finally
            MsgBox("test")
        End Try
    End Sub

I only recently started coding in vb.net again, I'm coding towards creating a product that will make my manual tasks easier, which means I'm not really investing time in understanding everything that's being coded, I didn't take exception handling into consideration from the start, had to add the handling afterwards.

One thing I'd like to find out that's not entirely relevant to this brick wall of a problem, if I enclose an entire sub routine in a try catch statement, can I use individual catch statements for each different exception that functions may bring up ? instead of enclosing individual segments of code with try catch statements.

[JosePat]

Post Cleared.

Post approval took a while so edited OP.

[NeedSomeAnswers]

My program is crashing and no exception is being thrown,

Unhandled exception

without seeing any of your code, my first question would be what error handling do you have in place? as as the message is telling you it appears that your not handling an error somewhere.

Are you missing error handling in some methods? maybe ones that you dont expect to error ?

[NeedSomeAnswers]

The following leave event causes the crash to occur, only after I've clicked btn_StockOnJobs(click event)

I am assuming that you now know where the error is coming from because you added in the error handling, so now you know that the leave event is causing the error, what error message do you get?

Why in the verify_Job_Number_Exists are you using oleDbException at the end instead of Exception which you are using everywhere else?

Also what is lbl_Noti and where are you declaring it ?

[JosePat]

The error handling was in there from the start.

I don't know what I did but the error has gone away. I might try to change things back one change at a time to see what it was, but I think it was when I changed the architecture from "all" or something like that to just x84.

But I cant think that it was something in my code that was causing the issue because I tried to catch all the exceptions and none of them were reacting.

[NeedSomeAnswers]

Ok its possible that its because your access database driver is 32 bit, and so when you choose x84 architecture your program will compile as 32 bit as well, where as All doesn't specify and so maybe it was compiling something as 64 bit which was causing an incompatibility.

[iantiu]

I've been looking into this as well and have found no resolution to this problem.

My VB.net application is caused by the crashing module TIPTSF.dll. I have exception handlers in place but none has been successful in catching it. The problem is not reproducible and it happens on random occasions. I use OLEDB and the Microsoft Access Database Engine 2010 as well. Has the OP found a resolution for this problem? Thank you.

Ian

[jmcilhinney]

Are you handling the UnhandledException event of your application? If not, you should be. That's where you catch exceptions that you didn't specifically predict, log them and then shut down gracefully instead of crashing.

[iantiu]

Are you handling the UnhandledException event of your application? If not, you should be. That's where you catch exceptions that you didn't specifically predict, log them and then shut down gracefully instead of crashing.

Yes. That's the weird thing about this error. The application crashes bypassing all event handlers (Unhandled Exception). Plus, these crashes are hard to reproduce because they happen at different times and actions. I've looked into timers but it's not that either. They only happen on certain computers hence I'm thinking it's because of corrupt DLLS. I'm hoping the OP has some insight on how he took care of this problem if he already has.