cannot add tool layer

Discussion created by leeyan on Jan 16, 2014
Latest reply on Mar 31, 2014 by dhadji
I want to add a "Model" or a tool into ArcMap to make it as a tool layer. But every time when I drag the "Model" into my ArcMap, it shows " Could not add the specified data object to the map.". Is there anyone know how to deal with this? Thank you.