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Is your model located inside a package? If so, there's a chance that the contents of your package(s) and class(es) are saved in multiple folders and files. Changes to a single class usually only affects one of those files, and the others are...
Thank you very much for this report. It does indeed seem like Model Center does not properly render redeclared connectors inside components. It is something we will look into. As a work-around you could create multiple versions of your component...
User-defined unit conversions have been implemented since the release of SystemModeler 5.1 and will be available in the upcoming release. It will let you define and add your own unit conversions which will automatically be picked up and made...
Right click anywhere on the drawing area and choose Page Setup from the context (popup) menu to show the Page Setup dialog. In the Page Setup dialog the size of the drawing area can be changed. The dialog can also be reached from the File menu...
Skip the curly braces when you use the range operator, 1:3 is what you want to use as 1:3 expands/evaluates to {1,2,3}.