possible fix for associative selection

Author: eng-dedalus

knowage-core/src/main/java/it/eng/spagobi/tools/dataset/associativity/strategy/OuterAssociativityManager.java

@@ -113,6 +113,10 @@ protected void calculateDatasets(String dataset, EdgeGroup fromEdgeGroup, Simple
 
 		IAssociativeDatasetContainer container = associativeDatasetContainers.get(dataset);
 
+        if (container == null) {
+            return;
+        }
+
 		if (datasetFilters.get(dataset) != null) {
 
 			List<SimpleFilter> filtersList = this.calculateMinMaxFilters(datasetFilters.get(dataset), datasetFilters.get(dataset), userProfile);