Hi, I am experiencing strange issue I can't find solution for. Sorry I'll need a bit lengthy explanation to describe it. I am using boost python for both automation and embedding the same time. I wrote trivial unit test module (can't use standard one). It has function check like this: def check( val ): check_impl( val ) def check_impl( val ): ... print "Error at line " + str(sys._getframe(2).f_lineno+1) ... ... This supposedly should produce error line location. And it does. Sometimes. test1.py: ... 8> check( False ) produces: Error in line 8: ... I've noticed though that in some cases line numbers are incorrect. I was able to narrow it down to the single function mymodule.foo() Before this function call line numbers are correct. After it incorrect. foo is a function implemented in c++ and exported using boost.python. I was able further to identify that the line at fault inside function foo implementation is the one invoking python function: void foo() { ... boost::python::object obj = ... obj(); ... } So. Finally the question: Is there way to fix/circumvent this somehow? Thanks, Gennadiy