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:
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]-
DDE command[sumatra, control]-
close document before running LaTeX
Do not close.