The 15.0 to 14.0 Fallback procedure does not contain any job that reverse or remove the DDUPDATE transactions contained in CABDSAMP members AD15UPG and AD15TRN, which are used by 15.0 installation job BDUPG06.
Could this be a problem? Do I have to manually reverse or remove the updates related to Datadictionary 15.0?
All the sites upgrading Datacom from 14.0 to 15.0
With all the PTFs that per 15.0 README (RI67375) must be applied on Datacom 14.0, this release can run with the upgraded Datadictionary. There is no need to back out any of those transactions.
See Datacom 15.0 README (RI67375) for the updated 14.0 PTFs list.