sentence: Most problems are due to awkward features in the markup language, which lead to coding errors.
sentences_before: Perhaps the most important issue to note, about complex templates, is the fact that the markup language is very reliable for complex template coding, even with complex calculations, so most template problems are often caused by obscure coding errors, rather than by bugs inside the MediaWiki software. The bugs inside the parser are so rare that most people will never experience one.
concept_name: problem
headings: Wikipedia:Advanced template coding