Bad File Mode Error When Writing to Text File

Question

I'm creating a logging module for my application.

I'm receiving the following error on the Sub WriteToLog when trying to write to the text file: "Error 54 - Bad File Mode"

Line: "fileStream.WriteLine Prefix & Data"

I based that sub off of the answer here

Any idea what I'm doing wrong? Here's my code so far:

Private CurrentLogName As String

Public Enum LogLevel
    Info = 0
    Error = 1
End Enum

Public Sub WriteToLog(ByRef Data As String, ByRef LogLevel As Integer)
    Dim fso As FileSystemObject
    Set fso = New FileSystemObject
    Dim fileStream As TextStream

    On Error GoTo FileError
    Set fileStream = fso.OpenTextFile(CurrentLogName)

    Dim Prefix As String
    Select Case LogLevel
        Case 0
            Prefix = "[Info] "
        Case 1
            Prefix = "[Error] "
        'TODO more cases
    End Select

    fileStream.WriteLine Prefix & Data
    fileStream.Close
    fso = Nothing
    fileStream = Nothing
    GoTo EndSub

    FileError:
        MsgBox "An error occurred while writing to the log file." & vbCrLf & Err.Description, 
        vbCritical, "Error"
    GoTo EndSub
    EndSub:
    End Sub

Private Sub test()
    CreateLogFile
    Call WriteToLog("Test", LogLevel.Error)
End Sub

score 3 · Accepted Answer · answered Jun 29 '21 at 18:43

As indicated in the doc for .OpenTextFile here, there is an optional ioMode parameter that sets the mode of the opened file. The doc never specifies, but it appears that default is ForReading which naturally will not allow you to (re)write nor append to the file.

Either way, just set the ioMode paramneter specifically to what you need.

Bad File Mode Error When Writing to Text File

1 Answers1