Trouble with including modules in fortran 90

[kmak]

I have a fortran 90 program called 'mainProg.f90' that uses a module named 'output' which in turn uses the module 'netcdf'.

In the program I have the command:
use netcdf

the netcdf.mod file is in the directory /home/makwana/cdf/netcdf-4.1.1/f90

I try to compile the program using a makefile which contains the following statement:

output.o: output.f90 indat.f90 fouryear.f90 deriv.f90
$(FC) $(SPEC_OPT) $(FOPTS) -w -I/home/makwana/cdf/netcdf-4.1.1/f90 -c output.f90 -o output.o


fouryear.f90, indat.f90, deriv.f90 are other modules which are working properly.

It gives me the following error message:

mainProg.f90(48): error #7002: Error in opening the compiled module file. Check INCLUDE paths. [NETCDF]
Use output
----^
compilation aborted for mainProg.f90 (code 1)

I do not know what could be the problem? Any help with this would be greatly appreciated.

Thanks.