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Thanks for your quick answer.

The document that I have was sent to me by a friend. When I change some text and compiled, no changes appear in the the pdf that was issued. Thats why I think its not compiling at all.

Back to your reply:
After opening the window with the alt+f7 I ticked the box next ...

Dear members,

I am a beginner in LateX and use TeXnicCenter to write a document.

When I compile the file, the following errors show up:


I found no \citation commands --- while reading file
I found no \bibdata command --- while reading file
I found no \bibstyle command --- while reading file ...