Extends read only vo get error in step 4

Question

when i extend read-only vo, for example add a attribute , it will get error in step 4,
the error :each row in the query result columns must be mapped to a unique query attribute in the Mapped entity columns.
for example :the orgi vo is oracle.apps.irc.offers.server.OfferTemplateDetailsVO and the sql is "Select distinct XTM.Template_id,
XTM.APPLICATION_SHORT_NAME,
XTM.TEMPLATE_CODE,
XTM.TEMPLATE_TYPE_CODE,
XTM.DS_APP_SHORT_NAME DS_App_Short_Name,
XTM.DATA_SOURCE_CODE,
XTM.DEFAULT_TERRITORY default_locale,
XTM.TEMPLATE_NAME,
fnd_profile.value('IRC_DEF_OFFER_LETTER_TYPE') default_offer_letter_type
from xdo_templates_vl XTM
where XTM.Template_id = :1
and i extends vo is CUXOfferTemplateDetailsVO and the sql is "Select distinct XTM.Template_id,
XTM.APPLICATION_SHORT_NAME,
XTM.TEMPLATE_CODE,
XTM.TEMPLATE_TYPE_CODE,
XTM.DS_APP_SHORT_NAME DS_App_Short_Name,
XTM.DATA_SOURCE_CODE,
XTM.DEFAULT_TERRITORY default_locale,
XTM.TEMPLATE_NAME,
XTM.START_DATE,
fnd_profile.value('IRC_DEF_OFFER_LETTER_TYPE') default_offer_letter_type
from xdo_templates_vl XTM
where XTM.Template_id = :1
my ebs is r12.1.1
please help me .thanks.

Answer 1

Ming,
Try to append the new attribute to the end of the existing Attribute list.
Regards,
Gyan