When attempting to upgrade from 8.1.x to 9.x the following error is displayed:
Processing step 'DSI 2021.0007.0018.0000 (DSI Oracle Connection string Migration Step)' failed. 1 - Custom command failed. Object reference not set to an instance of an object.
原因
Incompatible connection string
対策
The only resolution is to export the Oracle synchronization projects. Once exported remove the Oracle synchronization projects from version 8.1.x, then proceed with the upgrade to 9.x. Once on 9.x it may be possible to import the Oracle synchronization projects but they may also need to be created from scratch.