Each Special Function Register (SFR) Interrupt used by DT_INT is denoted with an IntFlagReg (PIRx), while the switch controlled by each bit within the SFR is denoted as a IntFlagBit (bit within PIRx). Somewhere there is a disconnect, but without being able to see your code, it's impossible to tell where. Post your DT-Ints-18 version so we can take a look. It may very well be you missed a comma somewhere.