Hey everybody, I am a mechanical engineer and new to Fortran(I have decent experience in programming in C, Matlab and understand languages similar to them). However the Fortran programming structure is new to me. Hence I am facing problems debugging a Fortran code. Here is the link of the code which I want to run. http://www2.meteo.uni-bonn.de/forschung/gruppen/tgwww/people/abott/fortran/coad1d.f I am using a Plato Fortran Compiler. The error message i get is : " error 399 - Unrecognised statement, did you forget to add /FIXED_FORMAT? " It comes for line no 10 which is : c dt : time step (input in sec) Can anyone please explain what's the reason of this message and is this the correct way of declaring variables in fortran ??? In case if you are unable to view the code then i shall post it in the reply thread. Thanks for any help in advance !!!