upgrading SAP-EP(Java) from version 7.0 to 7.1/7.2

Hi Experts,

We have an Application currently working on SAP EP(JAVA) 7.0.

We are looking forward to upgrade our EP from 7.0 to higher version (CE 7.1 or CE 7.2).

Kindly advise us about issues in this upgrade.

Also suggest if upgrade would be better option or simply updating the support packages (like EHP1 or EHP2) for EP7.0 would be better.

Also let me know the steps involved in performing upgrade/update.

Hope to get answers from you.

regards,

Rajeev Parmar