CCS/LAUNCHXL-CC1310: C file - Syntax not highlighted (not opened in generic text editor)

Tool/software: Code Composer Studio

Hi 

I am writing the code in CCS Version: 9.0.1.00004, and I am writing code for cc1310 (launchpad). It is very strange to see that all the .c and .h files in my project has syntax highlighting except for one .c file, which has more lines of code, the header file for that file works well. However, even though it is not syntax highlighted, functions/variables/etc are all hyperlinked to their corresponding definitions.

I did

-click the restore defaults of the syntax colouring options in the preferences dialog

-tried copying and pasting all the code to a different file 

-confirmed that I am opening it in the C/C++ editor and not the generic editor

But all these tries didn't fix the problem. Please suggest me with me a good solution as I wasn't able to find it anywhere online.

Thanks

Subil Krishnan