System.Runtime.InteropServices.COMException - Excel can't access file (...)
<p>I've googled everything. Still no idea what's happening.</p>

<p>I have a vb.net form that let's me insert txt file values into excel.
The thing is it gives me an error when i use
<code>xlWorkSheet.SaveAs("C:\" &amp; TextBox3.Text &amp; ".xlsx")</code></p>

<p>but when i use <code>xlWorkSheet.SaveAs("C:\Users\User\Desktop\" &amp; TextBox3.Text &amp; ".xlsx")</code> it works fine ( in my computer ). In other computers it gives me the same error..</p>

<p>The error is System.Runtime.InteropServices.COMException , and the "extension" depends almost everytime.
Microsoft Excel can't access the file 'C:\C6703D00'. ( i refer to C6703D00 nowhere)</p>

<p>[kinda translating]- Error details:</p>

<p>• Filename or path don't exist</p>

<p>• the file is already in use.</p>

<p>• the workbook you're trying to save has the same name as an open book.</p>

<p>I'm using Visual Studio 2013 vb.net .netframework v4.5 ..
i can post more code in question if you need.</p>