Answer

You probably got a message similar to ``Segmentation fault (core dumped)''. That's a pretty ugly error message. If you get an error message like that, it means that Fortran has gone so far wrong that the operating system has had to step in and shut down the program. If you get an error like this during the execution of a large program, you'll probably have no idea exactly where something went wrong. But it may well be because you used too few arguments to a function.

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