I have been facing this intermittent problem with TeXnicCenter [TC] forward search.

I have gone through many posts in TeX.SX and I have followed what is to be done. It works at times and at times NOT. I am not able to figure out the root cause of the problem.
My configuration for build in [TXC] is as follows:
Exec path
C:\Program Files (x86)\SumatraPDF\SumatraPDF.exe -inverse-search "\"C:\Program Files\TeXnicCenter\TeXnicCenter.exe\" /ddecmd \"[goto('%f','%l')]'\""View project output
DDE Command[sumatra, control]-[Open("%bm.pdf",0,1,1)]Fwd search
DDE command[sumatra, control]-[ForwardSearch("%bm.pdf","%Wc",%l,0,0,1)]close document before running LaTeX
Do not close.
Screenshot:

'too much, and I would add double quotes, because you have spaces in the path. So try out:"C:\Program Files (x86)\SumatraPDF\SumatraPDF.exe" -inverse-search "\"C:\Program Files\TeXnicCenter\TeXnicCenter.exe\" /ddecmd \"[goto('%f','%l')]\"". Also a suggestion: Add the option-reuse-instance, then the open window is reused. – Speravir May 05 '13 at 00:08"C:\Program Files (x86)\SumatraPDF\SumatraPDF.exe" -reuse-instance -inverse-search "\"C:\Program Files\TeXnicCenter\TeXnicCenter.exe\" /ddecmd \"[goto('%f','%l')]\""– Rene Duchamp May 05 '13 at 04:55CTRL+F5) or (CTRL+SHIFT+F5) the TeXnicCenter compiles -> Opens Sumatra -> Gets stuck ... It doesnt even show the final PDF output on sumatra. Its like its compiling for ever. – Rene Duchamp May 05 '13 at 18:53\documentclass{...}and ending with\end{document}. – Speravir May 05 '13 at 19:51C:\Program Files, let’s say for testing inC:\SumatraPDFor inC:\LaTeX\SumatraPDF. Then change the according path in TXC and try again. – Speravir May 06 '13 at 01:43