APEX: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.

I am using Apex 4.2.2.00.11
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.

336554,
Looks like there is a 127-column limit on the number of report columns supported when using that wizard. Do you have more than that?
57434

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