Project scenario ：

Use Modelsim An error occurred during the simulation ：Instantiation of ‘****’ failed. The design unit was not found.

Problem description

When writing simulation test files , It refers to other modules besides the simulated main file , such as IP nucleus 、 Simulation model, etc , There is an error ：Instantiation of ‘****’ failed. The design unit was not found., Show that the design is not found .

Solution ：

When setting the simulation script, you need to add other modules besides the simulated main file , such as IP nucleus 、 Simulation models are also added , Here's the picture

1. Add the simulation top-level file to the script , At the same time, pay attention to the name of the above simulation file and fill in the main file , The operation is not complete yet , Do not click OK sign out
2. Click three points again to select the file , Here I also need to add a simulation model and a pll IP nucleus , After selection , Just click Add, There is no need to change the name above


3. Click on OK, After normal operation, the simulation can be carried out