In a directory  i put a model file (Apollo12a.mo).

In a subdirectory named 'Core' i put the package files. package.mo, Body.mo, CelestialBody.mo, Rocket.mo.

In de file Apollo12a.mo i put the import Core; statement.

When i run the command 'omc Moonlanding.mos' i get the error message 'Class Core.CelestialBody not found'.
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mos file:
loadFile("Moonlanding.mo");
simulate(MoonLanding, stopTime=230);
plot({apollo.altitude,apollo.thrust});
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package file in the Core directory
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within ;

encapsulated package Core "Contains the Core classes and models"

end Core;
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Q: Where does omc look for the 'import Core' statement.