If an assembly is used as a tool model, the system will search the assembly first, and then all the component parts in the same order as they were assembled (that is, the first component will be searched first), for the tool parameters and origin data. Once a parameter is set, all values for the same parameter found later will be ignored. In other words, the top-level assembly parameters take precedence over component parameters, and after that the precedence is determined by the order of assembly.

If, after all components are searched, some of the tool parameters are missing, an error message will appear and you will be asked to select another tool (if using the tool By Reference) or to supply the missing values (if using the tool By Copy).