Errors when using ssc_build – Invalid use of node voltage in custom Simscape component

Hello everyone,

I am trying to generate a Simulink library from custom Simscape components using ssc_build, but I am encountering compilation errors.

Context

I am converting a SPICE GaN FET model (EPC device) into a Simscape component and building the library with:

ssc_build EPCGaNLibrary

The library generation fails with the following error:

Generating Simulink library 'EPCGaNLibrary_lib' in the current directory 
'C:\Users\PC\Desktop\LLC\Simulink_LLC\Article_2\EPCGaNLibrary' ...
    
Error using ssc_build
Failed to generate 'EPCGaNLibrary_lib'

Error in spice_to_ssc (line 5)
ssc_build EPCGaNLibrary

Caused by:
Invalid use of value 'drain.v'. All entities referenced in this expression must be valid parameters.
• In EPCGaNLibrary.EPC2071 (line 157)
• In EPCGaNLibrary.EPC2071 (line 152)

Thank you in advance for your help.

Best regards,

Souhail