The UC3825A symbol in ExampleUC3825A.qsch is a hierarchical symbol that links to a child schematic. In the child schematic, it contains a DLL block and links to a .dll file. Therefore, the easiest way is to have that child schematic and dll file also in your working folder.
embedded subckt symbol
This is a subckt symbol which contains embedded .subckt netlist, you can drag this symbol to your schematic (.qsym doesn’t have to include in working directory), but you still have to put the .dll into your working folder, or using .libpath to link to it.
UC3825A(with .subckt).qsym (2.6 KB)