Hi, I got the following exception thrown, when I have multiple tabs (boost 1.33.1). The code worked fine with boost 1.32.0. I'm wondering if there any specific reason to throw this exception in the newer version. If I need multiple tabs, are there any work around? Thanks, Peng terminate called after throwing an instance of 'boost::program_options::error' what(): Only one tab per paragraph is allowed Aborted