Generate of a model which has been upgraded to 8.6 from 8.0, produces generation error. Further investigation revealed it was caused by failing to generate a procedure with a view with no attributes added.
Prior to upgrading, that is, in the 8.0 environment, no generation error occurred by turning off the consistency check (CC) option at generation. The generation process could be continued.
However, after upgrading to 8.6, even if the consistency check option at generation is turned off, generation error occurs and processing cannot be continued. The same error occurs in the 8.5 environment.
Starting in 8.5 we supported C servers being used as a service. The new code to support that feature is the code that rejects Server psteps that have import views with no attributes.
So, the error is a consequence of that feature. The change was not documented because this is a behavior resulting from consistency check errors.