This RuntimeException is used to indicate a problem within SnuggleTeX which is due to a mis-configuration of SnuggleTeX, rather than a problem with client input or bad logic within SnuggleTeX.

I have made this an unchecked Exception since these types of problems are not likely to occur in normal circumstances and software interacting with SnuggleTeX is perhaps unlikely to be able to fix the situation without some work, so the burden of having to declare these types of Exceptions is avoided.

SnuggleTeX Developer Note

Throw this Exception for things like unexpected problems with JAXP and such-like. (E.g. not being able to configure a DocumentBuilderFactory, unable to find or compile one of the internal XSLT stylesheets...)