Problems to use a BADI

I have a function (ALM_MEREP_070_GETLIST) that I need to use a BADI to modify some data. But this function can´t call this BADI.

At the code of this function, at line 192 have the following code:

IF lv_existing EQ gc_x.

This variable must have the value 'X' to call the BADI, but it is comming with the value 'N'.

The name of BADI is ALM_ME_070_INVENTORY.

Anyone knows what is happening?

Thanks!