[TxMt] latexmk

I hope you will forgive the newbie question, but I've searched the documentation for an answer and can't see one.

I'm trying to use the build comand of the latex bundle with latexmk.pl

I've set my environment variables to:

TM_LATEX_COMPILER = [Path to latexmk] (though I still see "success" for building even if this path is wrong) TM_LATEX_VIEWER = preview

Yet the pdf is not generated. This could be because latexmk requires the argument -pdf to produce a pdf, but I don't know how to specify that, but the build process is so short, I'm not sure that latexmk is being called at all.

Can anyone tell me what I'm doing wrong?

Best wishes,

Nicholas