Hi
SAP is not supporting dual stack(ABA{+JAVA) system in SAP ERP. when you are install the new SAP ERP system. you have to install the ABAP & JAVA as a separate system and then do the integration. some of the few system only supported dual stack(ABA{+JAVA)(Solution Manager. SAP PO/PI)
Kindly refer the SAP Note & KBA about dual stack supports
1816819 - Dual Stack support for Business Suite systems
1468349 - SAP Business Suite 7 for SAP NetWeaver 7.3 hub systems
1868861 - Dual Stack Installation based on SAP NetWeaver 7.00 using Software Provisioning Manager
BR
SS