How to add user material's library to "General" Piping code ?

I've prepared a new material's library and want to use it in analyses where Piping Code is set to "General" option.

I've also modified a PCFinUI.xml file to make accessible new library in PCF Translator and It works pretty good. After translation in NTL models materials (steels) from my material's library are adopted.

After successful opening of NTL file, when I want to change "Piping Code" to "General" and "Material" to my material's library, AutoPIPE stops and can be only closed. How to configure a program to resolve above described  problem ?