When you plan to upgrade Oracle Application Express (APEX) from version 5.1.0 to 5.1.1 please be aware to download a patch from MOS instead the 5.1.1 version from OTN.
The text on the OTN page is a bit misleading – and a customer I work with downloaded the wrong version which led to a failed upgrade – even though the scripts seem to be made for this patch upgrade.

Oracle APEX 5.1.1 download on OTN
Even though the page says “This is a cumulative patch set for Application Express 5.1.0” the page offers you a full install and not …
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