Do you mean how to properly use the .inc directive in LTspice?
There are 2 ways to easily invoke the usage of this directive
.inc <filename> - this can be used considering that the location of the file you are calling is located on the LTspice directory or of the same folder as your .asc file.
.inc <Path/FileName> - This can be used for files that is not located on the LTspice model directories or not included in the same folder as your .asc file.
Either of the two should work depending on your desire.
Thank you for sharing your Model File here. I tried to look at the contents and it seems that this is a Model File that contains a different kind of language. Can you share also the symbol file that is related the models inside this as I would like to try this with something I can work and see if it would work?
That is an encrypted model for HSPICE. Portions of it are not encrypted, but most of it is. I'm sorry, but it can not be used with LTspice, and can not be converted to LTspice. It is for HSPICE only.
