SaveAs giving "Unspecified error"

[L42]

I'm trying to copy each slide from a presentation and save each slide in it's own ppt-file. This is my code (I know this is not VBA, but I'm hoping you can help regardless):

function exportSingleSlides(pathname, filename){	var app = new ActiveXObject("PowerPoint.Application");
	app.Visible = true;


	// Open the presentation
	var presentation = app.Presentations.Open(pathname+filename, true);
	var tmpPresentation; // Used to store a new presentation for each slide.


	var e = new Enumerator(presentation.Slides);
	var slide;
	e.moveFirst();
	var i = 0;
	while (!e.atEnd()) {
		i++;
		slide = e.item(); // gets this slide


		// Export slide to png
		slide.Export(pathname + 'slide' + (i < 10 ? '0' + i : i) + '.png', 'PNG', 1920, 1080);


		// Open new presentation
		tmpPresentation = app.Presentations.Add();


		// Set up the slide size to be the same as the source.
		tmpPresentation.PageSetup.SlideHeight = presentation.PageSetup.SlideHeight;
		tmpPresentation.PageSetup.SlideWidth = presentation.PageSetup.SlideWidth;


		// Get the layout from the source slide
		layout = slide.CustomLayout;
		
		// Copy current slide and paste into new presentation
		slide.Copy();
		tmpPresentation.Slides.Paste(1);


		// Set the layout
		tmpPresentation.Slides(1).CustomLayout = layout;
		
		// Save and close
		tmpPresentation.SaveAs(pathname + 'slide' + (i < 10 ? '0' + i : i));
		tmpPresentation.Close();
		e.moveNext();
	}


	// Close the presentation. (But how do I close powerpoint entirely?)
	presentation.Close();
	app.Quit();
}


// Which file are we looking at?
var pathname = 'C:\\Users\\Stian\\Dropbox\\jobb\\RB\\powerpoint parser\\';
var filename = 'test.pptx';


exportSingleSlides(pathname, filename);

Running this gives me a "Unspecified error" at tmpPresentation.SaveAs(). And that's odd, because it works as it should if I remove the line that sets CustomLayout = layout. Help?

[John Wilson]

I'm not a C# person but if you are running in 2010 or later there is a new method .PublishSlides which publishes your presentation as a series of single slide presentations. Although it is intended for SharePoint it works with a local path as long as the original is already saved.

http://msdn.microsoft.com/en-us/libr...ice.14%29.aspx