Others may disagree, but I am a fan of creating the first cut of ADF forms for Oracle BPM using the human task's auto-generation feature. While this worked well in previous releases, in 126.96.36.199, 188.8.131.52 and 184.108.40.206 small manual edits are now needed to eliminate the errors on the generated form.
There are now two types of errors caused by 12.2.1.x auto-generation - edAttTy errors and duplicate ID errors.
While this blog describes the manual edits you can make to the auto-generated .jspx files to correct the issues:
The first type of error on the generated page causes "Referenced id edAttTy does not exist" errors throughout the form:
Although customer support document Doc ID 2192543.1 describes the issue, this describes how the forms can be fixed.
1. In JDeveloper, click the Source tab at the lower left corner of the form that has the error. Read the complete article here.
For regular information on Oracle PaaS become a member in the SOA & BPM Partner Community for registration please visit www.oracle.com/goto/emea/soa (OPN account required) If you need support with your account please contact the Oracle Partner Business Center.