you must run:
./iasl61 -da -dl -fe refs.txt *.aml
refs.txt file:
External(MDBG, MethodObj, 1)
External(_GPE.MMTB, MethodObj, 0)
External(_SB_.PCI0.LPCB.H_EC.ECWT, MethodObj, 2)
External(_SB_.PCI0.LPCB.H_EC.ECRD, MethodObj, 1)
External(_SB_.PCI0.PEG0.PEGP.SGPO, MethodObj, 2)...