What is happening in your video at that point in the timeline?
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-Premiere Pro Video Editing Information FAQ http://forums.adobe.com/message/4200840
Sorry for the trouble. Have you used any third party effects in the project?
Just for a test, change the renderer in project settings and try to render again. Here are the steps: FAQ: How to change the Video Renderer in Premiere Pro?
Let us know the status.
Are we talking making previews or exporting?