I recently installed WinEdt 10 and use SumatraPDF.
With SyncTeX switch --synctex=1 (i.e. specifying .synctex.gz), forward search (Shift+F8) doesn't work.
However, Shift+F8 works fine with --synctex=-1.
Shift+F8 also works fine with either SyncTeX switch in WinEdt 7.
Is this a known problem with WinEdt 10, or is there a problem (what?) with my installation?

--synctex=1and "SyncTeX Filetype" to.synctex.gz. Then compile again and retry. It should work (it works fine for me, if it doesn't for you, you must have changed something else in WinEdt configuration) – karlkoeller Nov 09 '16 at 18:20.synctex, not.synctex.gz. It's a shame it doesn't change automatically when you change the SyncTeX Switch. – David Bevan Nov 10 '16 at 08:09