a very easy hint: did you type "a.out" or "./a.out" ?? on unix it's different. on IMAC... don't know :-) good luck! leo On Fri, Mar 6, 2009 at 9:21 PM, Hendrik Schoenfelder <hendrik.schoenfelder@xxxxxx> wrote: > > I installed gfortran on my brandnew IMAC and learned how to invoke it using > the command line. The program does create an output file named a.out from > the most simple program after giving an aparently harmless warning (³ld > warning: duplicate dylib /usr/local/lib/libgcc_s.1.dylib²). But when I try > to run it, i get the message ³a.out: command not found². Strange. I feel > like an idiot. Can anyone help? > Hendrik > >