Directory.CreateDirectory causes access violation

[holisticdeveloper]

Hi,

I've found a case where using Directory.CreateDirectory causes an access violation when my app shuts down.

To repro the problem, create a new VB6 Windows app. Add a module with the following code:

Option Explicit

Public Sub Main()
   Dim localDirectory As String
   localDirectory = "C:\Documents and Settings\Stratagen\Local Settings\Application Data\StrataGen Systems\ADEPT 4 Client\Apps"

   VBCorLib.Directory.CreateDirectory localDirectory
End Sub

Then set Sub Main as the startup object.

Given that the directory "C:\Documents and Settings\Stratagen\Local Settings\Application Data\StrataGen Systems\ADEPT 4 Client" already exists and is empty, the app will create the "Apps" subfolder but will throw an access violation when ending.

Note, I'm running version 2.3.1 as posted on this thread:
killian35.proboards.com/index.cgi?board=Help&action=display&thread=98

[Kelly Ethridge]

Are you sure you have permission to create that directory? Can you create it using the same thing in .NET?

[holisticdeveloper]

permissions are not a problem -- replacing the CreateDirectory call with MkDir (the native VB/VBA function) works just fine.

[Kelly Ethridge]

I get a memory access violation on an XP machine. I don't know why, but if you set the resulting DirectoryInfo to a variable and display the Name property in a MsgBox it doesn't crash. If you create the directory using the DirectoryInfo instead of Directory, it works.

Dim d As DirectoryInfo
Set d = Cor.NewDirectoryInfo(localDirectory)
d.Create


[holisticdeveloper]

It's not urgent for me at the moment; I've put a comment in our code as to why were using MkDir for now. But I thought I would report it so that hopefully you could find a fix at some point.

PS - Thanks again for creating this great library!

[holisticdeveloper]

I've run into another recurrence of this problem that happens when using almost any method from the "static" Directory, File, or Path objects. I've made as simple of a repro as I can, but I can't get it to cause the crash on another machine. By commenting out various bits of VBCorLib code and compiling a private version of it, it seems to be related to the Path object's use of the mPath StringBuilder. If I can get it to repro on other machines I'll let you know.