ALauncher | ALauncher | Runtime Evironment library

I looked at both your questions, and although I have no experience with GeckoFx, I would start with way the file is being created locally. Your getting an AccessViolation -2147467261 which usually means corrupt memory(or at least locked memory).

This may explain the behavior you described in your other question. If the Directory specified in globalParameters.getDownloadDirectory() is itself invalid, or it became corrupted by whatever is causing your root issue, the Dialog may close(this is just speculation, as it doesn't explain why no error is thrown).

To debug this, I would log every time you create a directory and/or file. I would also check periodically throughout execution that you have access to the Directory and File you are trying to save to. The reason I would do this is because the AccessViolation is happening in the unmanaged function GetSaveFileName(OPENFILENAME_I ofn). This is the function used to initialize the dialog and where I believe the InitialDirectory is set. You should be able to see the InitialDirectory and default file name. With this data, when it bugs out, you will hopefully see an pattern.

RunFileDialog

GetSaveFileName

OPENFILENAME

It is hard to be more specific as you didn't describe how globalParameters.getDownloadDirectory() is being populated or if it changes. To this point, one thread mentioned that .RestoreDirectory may be the cause of the issue, so maybe try disabling it. You also said that the error is thrown on line 822 but did not include line numbers so I don't know which exact line is bugging out.

On as side note, I'm not sure what your using objTarget As nsILocalFilefor and it doesn't seem like you use it further in your code. This may be where your memory is being corrupted or it is just my ignorance of GeckoFx.

If none of this works, you may need to figure out to get the unmanaged code StackTrace from inside of System.Windows.Forms.UnsafeNativeMethods.GetSaveFileName(OPENFILENAME_I ofn).

General AccessViolation TroubleShooting

-2147467261 Error

-2147467261 Error

Good Luck!