ESS Portal upgrade.

Hi All,

We going for upgrade from

Source version of R/3: SAP ECC 6.0 EA-HR602
Target Version of R/3 : SAP ECC 6.0 EHP6

source Version of portal: Netweaver7.0

Target Version of portal: Netweaver7.3

Ess BP Version: sap.com BP_ERP5ESS 1.2 SP3

My question is when we are going for upgrade to Netweaver7.3 or Netweaver7.2, will existing ESS BP will work in target portal.

Kindly post your suggestions.

Thanks,

Santosh.