Fixing NullPointerException in EdmNavigationPropertyImplProv.getMultiplicity
Sometimes you may receive a NullPointerException in the getMultiplicity function of EdmNavigationPropertyImplProv.java, part of the Olingo OData library. This is caused by not having set associations / association sets up correction (i.e. foreign keys). To fix the problem you either need to fix your associations and association sets to match and have ‘setMultiplicity’ calls, or …
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