Hi,

This error message appears when PSpice is not able to find the subcircuit model definition in its search path. To fix this, we need to make sure that model file being used by parts is defined in the configured libraries (.lib files).

So first, make sure that you have configured the library file. For this;

   1. For Cadence installation libraries: In Capture, choose PSpice — Edit Simulation Profile. Select the Configuration Files tab and then select  Library. Check if nom.lib exists in the configured files section. In case not, click Browse for Filename and go to the location             <CDS_INSTALL_DIR >\tools\pspice\library\nom.lib. Click Add as Global and then OK.

   2. For user defined vendor models: In Capture, choose PSpice — Edit Simulation Profile. Select the Configuration Files tab and then select Library. Browse to the location where the model is saved and click either Add to Design or Add to Profile. Click OK.

Now, if you are getting error even after adding libraries then first quick check is to make sure that .lib files are placed at writable location. It is needed as PSpice needs to write index files for the libraries.

Still if PSpice is unable to find the subcircuit in the configured libraries then check for following:

Double click on the part, for which you get error, to open Property editor. Here find the property ‘Implementation’ and note its value.

It is the value of implementation property by which PSpice searches for subcircuit in the libraries. So, open the .lib file in a text editor and find the model definition of this part and make sure that name of subcircuit and value of implementation is same. You can either change the value of implementation in schematic or name of subcircuit in .lib file.

Changing the in the schematic only resolves the problem for this current design. To permanently fix the issue, you can change value of implementation on this pat in the Capture library (.olb file) or correct the SUBCKT name in .lib file.

Thanks