In FeynCalc-9.3, I read "BMHV is algebraically consistent but often suffers from nonconservation of currents in the final results. The conservation must be then enfornced by introducing finite counter-terms. The counter-terms are to be supplied by the user, since FeynCalc does not do this automatically".
I want to know under what circumstances we need to introduce finite counter-terms.
And when I calculate Charged Higgs decay into W boson and Z boson in the 2HDM model at two loop level, Do I need to add some finite counter-terms by hand?
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