Boostc Licence Not Valid? in Bug Reports Posted September 8, 2015 · Report reply Hi. I have problem with registration of boostc compiler. i tried open cmd as administrator and started preg. when i fill the name field and licence key field and select boostc compiler radiobutton and try to register i get error "invalid name or key (not licenced)". Log shows "failed to register (code:5). what could be the problem??