I am constructing a geoprocessing Model in ArcGIS 10.4.1 using a file geodatabase of file gdb feature classes and a toolbox. I am stuck because the "Add Field" ,"Select by Location" and "Select by Attribute" tools produce a "Composite" data type regardless of the input, a data type that makes no sense considering I have never used it before. No matter what workspace I used (local, network, etc.), this occurs. I don't have issues with other tools in the data management toolset, or in any other toolsets. If anyone can advise I would greatly appreciate this as its incredibly frustrating - my deliverables need to be in a model format so clients can use them. There does not seem to be any resources online tackling this issue.