Getting error while creating form and report on webservice: ORA-20001: Unable to create form on table. ORA-02263: need to specify the datatype for this column.

Question

i am using the following description to create a web service reference:
web reference :REST
Name :Yahoo Map
URL :http://local.yahooapis.com/MapsService/V1/mapImage
HTTP Method: GET
Basic Authentication: No
Add Parameter:
Name       Type
appid        String
location    String
Output Format: XML
XPath to Output Parameters : /Result
Output Parameter:
Name       Path       Type
Url          /text()      String
Then i tried to create form and report on webservice:
Web Service Reference Type: Yahoo Map
Operation: doREST
All the fields i keep as default
I tick the checkbox (url)in report Parameter
After clicking next whereever required i click create button
I get the following error
ORA-20001: Unable to create form on table. ORA-02263: need to specify the datatype for this column.
Please someone help to solve this as i need to fix it urgently.

Answer 1

i exported the application from apex.oracle.com and imported it to our environment
import went fine, but when I ran the IR page I got
ORA-20001: get_dbms_sql_cursor error ORA-00904: : invalid identifier
evidently the problem is a lack of public execute on DBMS_LOB, which is used in the generated IR source.
while waiting for the DBA to grant privs on DBMS_LOB, changing the dbms_lob.getlength call to length() fixes the IR.
however, i am not getting the download link on the associated form page... changed templates, that's not the issue -- we'll see if that's a dbms_lob issue as well