CONCATENATE and PARENT function not working

Hello Experts,

I'm trying to do a calc combining CONCATENATE and PARENT function and is not working. This is my code:

FIX(&Act_Year,"Real","V0_Input","Dim1","Dim2",@RELATIVE("Center",0 ),@RELATIVE("GL",0 ),@RELATIVE("Geography",0 ),@RELATIVE("Client",0 ))

FIX(@RELATIVE("Group1",0 ))
"Jan"(
"V0_Input"->"Dim1_NA"->"Dim2_NA"->"Center_NA"->"GL_NA"->"Geography_NA"->"Client_NA"->@member(@concatenate(@name(@parent(@currmbr("Account"))),"_Aux"))="V0_Input"->"Dim1_NA"->"Dim2_NA"->"Center_NA"->"GL_NA"->"Geography_NA"->"Client_NA"->@member(@concatenate(@name(@parent(@currmbr("Account"))),"_Aux"))+"V0_Input_CO"->@CURRMBR("Dim1")->@CURRMBR("Dim2")->@CURRMBR("Group1")->@CURRMBR("Center")->@CURRMBR("GL")->@CURRMBR("Geography")->@CURRMBR("Client");