Hi,
This error may occur when there is a mismatch in the datatype of the provided value for the field. Hence, you could check the parameter value you have specified for taxid_list in the body of the request. To get detailed information about the error you are experiencing, please check the **vdp.log** which will be available under **<DENODO_HOME>/logs/vdp** folder.
Also, the **X-HTTP-Method-Override** header allows applications to “tunnel” other HTTP methods inside POST requests. You can tunnel the following methods inside a POST request: GET, PUT and DELETE. You can put an XML document, a JSON, or an HTML form in the body, and the request has to have the header** Content-Type**. Hence, please ensure whether you have included the header Content-Type.
To [send the input parameters in the body of the request, in a JSON document](https://community.denodo.com/docs/html/browse/latest/vdp/administration/restful_architecture/restful_web_service/input_parameters_of_the_restful_web_service#tunnel-http-methods-inside-another-http-method-x-http-method-override#:~:text=Sending%20Input%20Parameters%20in%20a%20JSON%20Document), add the HTTP header **Content-Type: application/json**.
You could refer to the section [Tunnel HTTP Methods Inside Another HTTP Method (X-HTTP-Method-Override)](https://community.denodo.com/docs/html/browse/latest/vdp/administration/restful_architecture/restful_web_service/input_parameters_of_the_restful_web_service#tunnel-http-methods-inside-another-http-method-x-http-method-override) of Virtual DataPort Administration Guide for more information.
Hope this helps!!
