I did what you said and litlle more, at the end of E1KNVIM, I put this code:
transfer_record.
g_edidd_segnam = 'E2KNVVM007'.
g_edidd_segnum = '0005'.
g_edidd_psgnum = '000001'.
g_edidd_hlevel = '02'.
E1KNVVM-MSGFN = DEBMAS2-MSGFN.
E1KNVVM-VKORG = DEBMAS2-VKORG2.
E1KNVVM-VTWEG = DEBMAS2-VTWEG2.
E1KNVVM-SPART = DEBMAS2-SPART2.
E1KNVVM-KALKS = '1'.
E1KNVVM-KONDA = '02'.
E1KNVVM-VSBED = '01'.
E1KNVVM-WAERS = DEBMAS2-WAERS.
E1KNVVM-ZTERM = '0001'.
transfer_record.
g_edidd_segnam = 'E2KNVIM'.
g_edidd_segnum = '0008'.
g_edidd_psgnum = '000005'.
g_edidd_hlevel = '04'.
E1KNVIM-MSGFN = DEBMAS2-MSGFN.
E1KNVIM-ALAND = 'FR'.
E1KNVIM-TATYP = 'MWST'.
E1KNVIM-TAXKD = '1'.
transfer_record.
It creates a new E1KNVVM segment but with an E1KNVIM structure and records...
Here is the result: