> > so simply testing > > on the value of processing-type would work better, maybe? > > Yes, should be okay now, let me know!
Nope, exactly the same. cache-relpath and cache-dir are not allowed to be nil. Meaning that if processing-type is 'mathjax they should be set to _some_ string anyway (the contents will be ignored eventually, but far down the line unfortunately ...) Something like instead of your 'let' line works: (let ((cache-relpath "") (cache-dir "") bfn) /v
