The controller method -

	@RequestMapping(value = "/encounters", method = RequestMethod.POST)
	@ResponseBody
	public Object createEncounters(@RequestBody String hl7,
			@RequestParam(value = "enterpriseId", required = true) String enterpriseId,
			@RequestParam(value = "idType", required = true) String idType,
			HttpServletRequest request,
	        HttpServletResponse response) throws ResponseException {

The error -

{"error":{"message":"The Resource Does not Support the Requested Operation","code":"org.openmrs.module.web.controller.RHEApatientController:286","deta
il":"java.lang.NullPointerException\r\n\tat org.openmrs.module.web.controller.RHEApatientController.createEncounters(RHEApatientController.java:286)\r
\n\tat sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)\r\n\tat sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:3
9)\r\n\tat sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)\r\n\tat java.lang.reflect.Method.invoke(Method.java:5
97)\r\n\tat org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:176)\r\n\tat org.spring
framework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:426)\r\n\tat org.springfra
mework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:414)\r\n\tat org.springframework.web.servl
et.DispatcherServlet.doDispatch(DispatcherServlet.java:790)\r\n\tat org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java
:719)\r\n\tat org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)\r\n\tat org.springframework.web.servlet.Frame
workServlet.doPost(FrameworkServlet.java:560)\r\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:727)\r\n\tat javax.servlet.http.HttpServ
let.service(HttpServlet.java:820)\r\n\tat org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)\r\n\tat org.mortbay.jetty.servlet.Ser
vletHandler$CachedChain.doFilter(ServletHandler.java:1093)\r\n\tat org.openmrs.module.web.filter.ForcePasswordChangeFilter.doFilter(ForcePasswordChang
eFilter.java:65)\r\n\tat org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)\r\n\tat org.openmrs.module.web.filter
.ModuleFilterChain.doFilter(ModuleFilterChain.java:76)\r\n\tat org.openmrs.module.xforms.web.XformsFilter.doFilter(XformsFilter.java:60)\r\n\tat org.o
penmrs.module.web.filter.ModuleFilterChain.doFilter(ModuleFilterChain.java:74)\r\n\tat org.openmrs.module.webservices.rest.web.filter.AuthorizationFil
ter.doFilter(AuthorizationFilter.java:100)\r\n\tat org.openmrs.module.web.filter.ModuleFilterChain.doFilter(ModuleFilterChain.java:74)\r\n\tat org.spr
ingframework.web.filter.ShallowEtagHeaderFilter.doFilterInternal(ShallowEtagHeaderFilter.java:58)\r\n\tat org.springframework.web.filter.OncePerReques
tFilter.doFilter(OncePerRequestFilter.java:76)\r\n\tat org.openmrs.module.web.filter.ModuleFilterChain.doFilter(ModuleFilterChain.java:74)\r\n\tat org
.openmrs.module.web.filter.ModuleFilter.doFilter(ModuleFilter.java:58)\r\n\tat org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHa
ndler.java:1084)\r\n\tat org.openmrs.web.filter.OpenmrsFilter.doFilterInternal(OpenmrsFilter.java:112)\r\n\tat org.springframework.web.filter.OncePerR
equestFilter.doFilter(OncePerRequestFilter.java:76)\r\n\tat org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)\r\
n\tat org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)\r\n\tat org.springframewor
k.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)\r\n\tat org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(Servlet
Handler.java:1084)\r\n\tat org.openmrs.web.filter.StartupFilter.doFilter(StartupFilter.java:83)\r\n\tat org.mortbay.jetty.servlet.ServletHandler$Cache
dChain.doFilter(ServletHandler.java:1084)\r\n\tat org.openmrs.web.filter.StartupFilter.doFilter(StartupFilter.java:83)\r\n\tat org.mortbay.jetty.servl
et.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)\r\n\tat org.openmrs.web.filter.StartupFilter.doFilter(StartupFilter.java:83)\r\n\tat
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)\r\n\tat org.springframework.web.filter.CharacterEncodingFilter
.doFilterInternal(CharacterEncodingFilter.java:88)\r\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)\
r\n\tat org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)\r\n\tat org.mortbay.jetty.servlet.ServletHandler.handl
e(ServletHandler.java:360)\r\n\tat org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)\r\n\tat org.mortbay.jetty.servlet.Sessi
onHandler.handle(SessionHandler.java:181)\r\n\tat org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:726)\r\n\tat org.mortbay.jetty.w
ebapp.WebAppContext.handle(WebAppContext.java:405)\r\n\tat org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:206
)\r\n\tat org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)\r\n\tat org.mortbay.jetty.handler.HandlerWrapper.handle(Handl
erWrapper.java:152)\r\n\tat org.mortbay.jetty.Server.handle(Server.java:324)\r\n\tat org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.jav
a:505)\r\n\tat org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843)\r\n\tat org.mortbay.jetty.HttpParser.parseNext(HttpPar
ser.java:648)\r\n\tat org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)\r\n\tat org.mortbay.jetty.HttpConnection.handle(HttpConnection.
java:380)\r\n\tat org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)\r\n\tat org.mortbay.thread.QueuedThreadPool$PoolThread.
run(QueuedThreadPool.java:488)\r\n"}}'idType' is not recognized as an internal or external command,