On 27 August 2012 20:28, Jason Clark wrote: > Jonathan, > > Yes that worked I changed my statement to: > > gfortran -I "c:\program files\aspentech\aspen plus > 2006.5\engine\commons" -xf77-cpp-input usrkpg2.f > > And it now works for all the common files in that directory. The new > issue is that there are common files that must be included located in > a different directory. I tried: > > -I "dir1" -I "dir2" which did not work, and That should work.