[common error] custom IP instantiation error

In a project, if you add your own IP when , It is necessary to connect each module by example , So that it can be connected with the original project , However, if the name is entered incorrectly during instantiation, it will lead to errors in the following figure , Modularization is not allowed , After asking the elder martial sister and checking the code, I found that the name of the second layer module was wrong when instantiating the next module , Lead to failure in instantiation , After modifying the code, you can successfully instantiate .

Be careful when writing code , Avoid making mistakes ！