StackOverflow2013

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copied!<p>First of all, what you are trying to achieve seems to be unsupported / not recommended by Microsoft:</p> <blockquote> <p>All current versions of Microsoft Office were designed, tested, and configured to run as end-user products on a client workstation. They assume an interactive desktop and user profile. <em>They do not provide the level of reentrancy or security that is necessary to meet the needs of server-side components that are designed to run unattended.</em></p> <p>Microsoft <strong>does not currently recommend</strong>, and <strong>does not support</strong>, Automation of Microsoft Office applications from <em>any unattended, non-interactive client application or component (including ASP, ASP.NET, DCOM, and NT Services)</em>, because Office may exhibit unstable behavior and/or deadlock when Office is run in this environment.</p> <p><em>If you are building a solution that runs in a server-side context, you should try to use components that have been made safe for unattended execution.</em> Or, you should try to <strong>find alternatives that allow at least part of the code to run client-side</strong>. If you use an Office application from a server-side solution, the application will lack many of the necessary capabilities to run successfully. Additionally, you will be taking risks with the stability of your overall solution.</p> </blockquote> <p>Source: <a href="http://support.microsoft.com/kb/257757" rel="nofollow noreferrer">http://support.microsoft.com/kb/257757</a></p> <p>With that said, it seems that a couple of other people have experienced a similar behavior under these settings, so I suggest you take a look at:</p> <ul> <li><a href="https://stackoverflow.com/questions/2081540/powerpoint-could-not-open-file">Powerpoint could not open file</a></li> <li><a href="https://stackoverflow.com/questions/729609/powerpoint-interop-fails-in-a-windows-service-but-works-fine-in-a-windows-form-a">Powerpoint Interop fails in a Windows Service but works fine in a Windows Form application</a></li> <li><a href="https://stackoverflow.com/questions/1006923/automating-office-via-windows-service-on-server-2008">Automating Office via Windows Service on Server 2008</a></li> </ul> <p>And further, to check that you open the <code>.pptx</code> right, I just tried the PowerPoint Interop bits of your code sample in a C# .NET 4.5 console application using PowerPoint Interop v. 15 (for Office 2013) on a standard desktop PC. And that works out of the box.</p>

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