Unable to Download FF Device Positioner SRD991 Rev18 on DeltaV v11.

Our system had only DD files for  Invensys SRD991 Rev 9 and 16. I have a new device with Rev 18 to install

Over the weekend we have installed DD files  on AMS and EWS(V11)  from this link on fieldbus.org site:

http://www.fieldbus.org/index.php?option=com_mtree&task=viewlink&link_id=1736&ffbstatus=Registered&Itemid=324

The device was commissioned successfully and you can see the methods ,process variable and configuration setup on AMS and EWS by right click menu.

However I could not download!!. The download error log reads

  • Error: The name 041770 was not found in the context
  • Error: Unable to get field function block
  • Error unable to open field
  • Generating failed
  • Generating cancelling
  • Download canceled.

The troubleshooting I carried out

I discovered that of the three items checked for download: Fieldbus device 03FCV201, Fieldbus Alarms, and SRD991 Analog Output blocks  the last one which is the AO block would not download. 

I tried to upload function blocks from the field device, all uploaded except the : SRD991_AO-62/041770 SHED_OPT  CV1

I checked the control module on Studio and saw that the AO block permitted mode, target mode and Normal mode are different from the fieldbus device viewing it from configuration setup. I tried to change these fieldbus device configuration setup  AO block modes to match the control studio but the AOTB Mode  was returning error. I could change the modes of Resource block , DI Transducer and DO transducer blocks from configuration setup but AO block proves sturbborn

Advise me

Emerson has sent me a link for DD files earlier I want to try that one. It has install.ini and .fhx in it unlike the one I have used from fieldbus site. Does that make sense?? If you have any help document on Un-installing  DD files from AMS and EWS I would appreciate it.

If the problem is not DD file installed from fieldbus.org site what else could be the issue

Please save me urgently