For clients on which the Sophis Risque or Sophis Value was already installed, during the migration, it is quite easy to detect which modifications have to be done when comparing the code. But this step is only one of the different tasks that have to be done. For example, almost nothing was changed on the interface CSRThirdParty (eq CSMThirdParty in C#) concerning the third parties (entities, depositaries, counterparties, brokers...). But unlucky, when trying to use some piece of code that permits to update the external reference, the domiciliation, the broker or whatever which field, you will got an exception in v7, indicating that the method is not implemented. This is a well known problem on each client migration.