Error: Design unit <name_of_unit> not found in searched libraries: <list_of_libraries>


When initializing the simulation of a Verilog design in Active-HDL, the following errors are observed in the Console window:

Error: Design unit <name_of_unit> not found in searched libraries: <list_of_libraries>
Error: E8005: Kernel process initialization failed.
Error: Simulation initialization failed.


Users need to specify the location of the libraries that are being used during simulation. For example, if you are using Verilog libraries, you would specify the location of the libraries by doing the following:

GUI specification

  1. Select Design | Settings from the main menu

  2. Go to Simulation | Verilog

  3. Click on the dotted square icon in the top right corner of the Verilog Libraries (-L) field

  4. Select the required library from the list and click OK

  5. Click Apply and then OK

Script specification

Use the -L switch in the asim/vsim command. For example:

vsim -work work -L unisim_ver top_level
Ask Us a Question
Ask Us a Question
Captcha ImageReload Captcha
Incorrect data entered.
Thank you! Your question has been submitted. Please allow 1-3 business days for someone to respond to your question.
Internal error occurred. Your question was not submitted. Please contact us using Feedback form.
We use cookies to ensure we give you the best user experience and to provide you with content we believe will be of relevance to you. If you continue to use our site, you consent to our use of cookies. A detailed overview on the use of cookies and other website information is located in our Privacy Policy.