When I try to "run LaTeX", either directly or not, from within LibreOffice, I get a message saying "Error executing PDF viewer". I don't know how to fix it.
I am using LibreOffice 3.4.5 and SumatraPDF 2.0.1 on Windows 7.
You will have to register SumatraPDF with Writer4LaTeX:
1. Open Tools-Options
2. Select Writer4LaTeX-Applications
3. Select PDF Viewer
4. Click Browse and select sumatraPDF.exe (probably located within in C:\Program Files)
5. Click OK
This should fix the problem.