API login request fails after installing API patch

Symptoms

While calling the login method of Changepoint API, the response generated does not contain the access token and the value tag.

Error/warning messages

Below is the SOAP response from the server:

<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:wsa="http://schemas.xmlsoap.org/ws/2004/03/addressing" xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd">

<soap:Header>      <wsa:Action>http://compuware.com/changepoint/CPWebService/WSLogin/LoginResponse</wsa:Action>

<wsa:MessageID>uuid:8ecd463a-5198-4b5e-9057-7c7361edc15f</wsa:MessageID>      <wsa:RelatesTo>uuid:e92ac012-6fd9-4465-b215-d721523eeea8</wsa:RelatesTo>      <wsa:To>http://schemas.xmlsoap.org/ws/2004/03/addressing/role/anonymous</wsa:To>      <wsse:Security>

<wsu:Timestamp wsu:Id="Timestamp-f1cdfa91-3d4e-4d03-885d-dccf799cf330">            <wsu:Created>2018-05-28T13:33:17Z</wsu:Created>

<wsu:Expires>2018-05-28T13:38:17Z</wsu:Expires>

</wsu:Timestamp>

</wsse:Security>

   </soap:Header>

   <soap:Body>

      <LoginResponse xmlns="http://compuware.com/changepoint/CPWebService/WSLogin">

         <LoginResult>

            <WSException>

               <LogLevel>8</LogLevel>

               <LogPath>C:\Program Files\Compuware\Changepoint\API\APILogs\</LogPath>

               <Number>0</Number>

               <Message/>

               <Source>Changepoint.CPWebService.WSLogin.Login</Source>

               <HaveErrors>false</HaveErrors>

            </WSException>

         </LoginResult>

      </LoginResponse>

   </soap:Body>

</soap:Envelope> 

Reason

Connection string was not configured

Resolution

Use Login Settings Utility to configure the API Web Service connection string