How to share variables with Yab lib?

[clasqm]

Also, curiously, when I import the subroutine file, I cannot used "#! /bin/yab" at the beginning of the imported .yab file or I get an error.

That is normal. When you IMPORT a library it actually takes the text of the library and pastes it onto the end of your main program, so now you have that shebang line in the middle of your program, which is ... not good.