In previous versions of MapleSim, when you imported a package called, for example, myPackage, the file containing the top-level package name could have been named either package.mo or myPackage.mo. This was an extension to the Modelica specification, which says that the file has to be named package.mo.

In MapleSim 6.1 and later, the file containing the top-level package name must be called package.mo.