Specified File Does Not Exist using netcdf.open command?

my code's first line: ncid1=netcdf.open('ncf_2014-07-01T13:33:48.nc','nowrite');

file "ncf_2014-07-01T13:33:48.nc" is in the folder in which I am running my code.

error :

Error in el10 (line 1) ncid1=netcdf.open('ncf_2014-07-01T13:33:48.nc','nowrite');

Any way out shall be helpful greatly.

Note: I need to use 'netcdf.open' command. For some strange reason I dont know Java is not installing on my PC and I cannot use 'panoply' or 'ncview' to view the variables and their dimensions to be able to use 'ncread' command. Sorry.