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Whenever a given moving load "Load" is created, two envelopes are also created "Load +" and "Load -".
If, however, that load is placed within a combination "Comb", the envelopes are called "Comb+" and "Comb-", without the space.
This isn't really a question, its just a comment. Since the only way to find the envelopes via API is through a name search, this is somewhat annoying, since the search now needs to be if(name = load.name + " +" || name = load.name + "+").