Hi, Jan!

Problem: MSVC does not include the exprseq::info() method, giving unresolved symbols when linking

Solution (rather, workaround): Add an unarchiver :-)

Note: Someone else suggested adding a dummy method in exprseq.cpp

basic* dummy_func(void) { return new exprseq(); }

but I thought that maybe an unarchiver is at least remotely useful...

I don't think so. Could you please add that dummy function (with a proper comment and wrapped by #ifdef _MSC_VER) instead? Best regards, Alexei