diff --git a/src/lib/jsonParse/jsonRequest.cpp b/src/lib/jsonParse/jsonRequest.cpp
index 1ebf8769ab..0679bfbd0e 100644
--- a/src/lib/jsonParse/jsonRequest.cpp
+++ b/src/lib/jsonParse/jsonRequest.cpp
@@ -29,6 +29,7 @@
 #include "logMsg/traceLevels.h"
 
 #include "common/limits.h"
+#include "common/errorMessages.h"
 #include "alarmMgr/alarmMgr.h"
 #include "ngsi/Request.h"
 #include "ngsi/ParseData.h"
@@ -66,6 +67,8 @@
 /* ****************************************************************************
 *
 * jsonRequest -
+*
+* FIXME PR: review this
 */
 static JsonRequest jsonRequest[] =
 {
@@ -194,13 +197,13 @@ std::string jsonTreat
     std::string  errorReply;
     char         reqTypeV[STRING_SIZE_FOR_INT];
 
-    restErrorReplyGet(ciP, SccBadRequest, details, &errorReply);
+    OrionError oe(SccBadRequest, details);
     snprintf(reqTypeV, sizeof(reqTypeV), "%d", request);
 
     std::string extra = std::string("RequestType ") + reqTypeV + " (" + requestType(request) + ")";
     alarmMgr.badInput(clientIp, "no request treating object found for RequestType", extra);
 
-    return errorReply;
+    return oe.toJson();
   }
 
   if (reqPP != NULL)
@@ -218,27 +221,22 @@ std::string jsonTreat
   }
   catch (const std::exception &e)
   {
-    std::string errorReply;
-    restErrorReplyGet(ciP, SccBadRequest, "JSON Parse Error", &errorReply);
+    OrionError oe(SccBadRequest, ERROR_DESC_PARSE, ERROR_PARSE);
     alarmMgr.badInput(clientIp, "JSON Parse Error", e.what());
-    return errorReply;
+    return oe.toJson();
   }
   catch (...)
   {
-    std::string errorReply;
-
-    restErrorReplyGet(ciP, SccBadRequest, "JSON Generic Error", &errorReply);
+    OrionError oe(SccBadRequest, ERROR_DESC_PARSE, ERROR_PARSE);
     alarmMgr.badInput(clientIp, "JSON parse generic error");
-    return errorReply;
+    return oe.toJson();
   }
 
   if (res != "OK")
   {
-    std::string answer;
     alarmMgr.badInput(clientIp, "JSON Parse Error", res);
-    ciP->httpStatusCode = SccBadRequest;
-    restErrorReplyGet(ciP, ciP->httpStatusCode, res, &answer);
-    return answer;
+    OrionError oe(SccBadRequest, ERROR_DESC_PARSE, ERROR_PARSE);
+    return oe.toJson();
   }
 
   if (ciP->inCompoundValue == true)
diff --git a/src/lib/rest/RestService.cpp b/src/lib/rest/RestService.cpp
index 4f055119de..9340b5c814 100644
--- a/src/lib/rest/RestService.cpp
+++ b/src/lib/rest/RestService.cpp
@@ -720,9 +720,9 @@ static std::string restService(ConnectionInfo* ciP, RestService* serviceV)
   // ... and this here is the error that is returned. A 400 Bad Request with "service XXX not recognized" as payload
   //
   std::string  details = std::string("service '") + ciP->url + "' not recognized";
-  std::string  answer;
 
-  restErrorReplyGet(ciP, SccBadRequest, ERROR_DESC_BAD_REQUEST_SERVICE_NOT_FOUND, &answer);
+  OrionError oe(SccBadRequest, ERROR_DESC_BAD_REQUEST_SERVICE_NOT_FOUND, ERROR_BAD_REQUEST);
+  std::string answer = oe.toJson();
   alarmMgr.badInput(clientIp, details);
   ciP->httpStatusCode = SccBadRequest;
   restReply(ciP, answer);
diff --git a/src/lib/rest/rest.cpp b/src/lib/rest/rest.cpp
index 48164c574a..518ce61373 100644
--- a/src/lib/rest/rest.cpp
+++ b/src/lib/rest/rest.cpp
@@ -984,10 +984,9 @@ static int contentTypeCheck(ConnectionInfo* ciP)
   if (ciP->httpHeaders.contentType.empty())
   {
     std::string details = "Content-Type header not used, default application/octet-stream is not supported";
+    OrionError oe(SccUnsupportedMediaType, details);
+    ciP->answer = oe.toJson();
     ciP->httpStatusCode = SccUnsupportedMediaType;
-    restErrorReplyGet(ciP, SccUnsupportedMediaType, details, &ciP->answer);
-    ciP->httpStatusCode = SccUnsupportedMediaType;
-
     return 1;
   }
 
@@ -995,8 +994,8 @@ static int contentTypeCheck(ConnectionInfo* ciP)
   if ((ciP->httpHeaders.contentType != "application/json") && (ciP->httpHeaders.contentType != "text/plain"))
   {
     std::string details = std::string("not supported content type: ") + ciP->httpHeaders.contentType;
-    ciP->httpStatusCode = SccUnsupportedMediaType;
-    restErrorReplyGet(ciP, SccUnsupportedMediaType, details, &ciP->answer);
+    OrionError oe(SccUnsupportedMediaType, details);
+    ciP->answer = oe.toJson();
     ciP->httpStatusCode = SccUnsupportedMediaType;
     return 1;
   }
@@ -1464,8 +1463,8 @@ static MHD_Result connectionTreat
 
     snprintf(details, sizeof(details), "payload size: %d, max size supported: %llu", ciP->httpHeaders.contentLength, inReqPayloadMaxSize);
     alarmMgr.badInput(clientIp, details);
-    restErrorReplyGet(ciP, SccRequestEntityTooLarge, details, &ciP->answer);
-
+    OrionError oe(SccRequestEntityTooLarge, details);
+    ciP->answer = oe.toJson();
     ciP->httpStatusCode = SccRequestEntityTooLarge;
   }
 
@@ -1559,9 +1558,8 @@ static MHD_Result connectionTreat
       (ciP->httpHeaders.contentLength == 0) &&
       ((strncasecmp(ciP->url.c_str(), "/log/", 5) != 0) && (strncasecmp(ciP->url.c_str(), "/admin/log", 10) != 0)))
   {
-    std::string errorMsg;
-
-    restErrorReplyGet(ciP, SccContentLengthRequired, "Zero/No Content-Length in PUT/POST/PATCH request", &errorMsg);
+    OrionError oe(SccContentLengthRequired, "Zero/No Content-Length in PUT/POST/PATCH request");
+    std::string errorMsg = oe.toJson();
     ciP->httpStatusCode  = SccContentLengthRequired;
     restReply(ciP, errorMsg);
     alarmMgr.badInput(clientIp, errorMsg);
diff --git a/src/lib/rest/restReply.cpp b/src/lib/rest/restReply.cpp
index 598f0cc68a..62ad51b121 100644
--- a/src/lib/rest/restReply.cpp
+++ b/src/lib/rest/restReply.cpp
@@ -145,73 +145,3 @@ void restReply(ConnectionInfo* ciP, const std::string& answer)
   MHD_destroy_response(response);
 }
 
-
-
-/* ****************************************************************************
-*
-* restErrorReplyGet -
-*
-* This function renders an error reply depending on the type of the request (ciP->restServiceP->request).
-*
-* The function is called from more than one place, especially from
-* restErrorReply(), but also from where the payload type is matched against the request URL.
-* Where the payload type is matched against the request URL, the incoming 'request' is a
-* request and not a response.
-*/
-void restErrorReplyGet(ConnectionInfo* ciP, HttpStatusCode code, const std::string& details, std::string* outStringP)
-{
-  StatusCode  errorCode(code, details, "errorCode");
-
-  ciP->httpStatusCode = SccOk;
-
-  if (ciP->restServiceP->request == RegisterContext)
-  {
-    RegisterContextResponse rcr("000000000000000000000000", errorCode);
-    *outStringP = rcr.toJsonV1();
-  }
-  else if (ciP->restServiceP->request == DiscoverContextAvailability)
-  {
-    DiscoverContextAvailabilityResponse dcar(errorCode);
-    *outStringP = dcar.toJsonV1();
-  }
-  else if (ciP->restServiceP->request == QueryContext)
-  {
-    QueryContextResponse  qcr(errorCode);
-    bool                  asJsonObject = (ciP->uriParam[URI_PARAM_ATTRIBUTE_FORMAT] == "object" && ciP->outMimeType == JSON);
-    *outStringP = qcr.toJsonV1(asJsonObject);
-  }
-  else if (ciP->restServiceP->request == SubscribeContext)
-  {
-    SubscribeContextResponse scr(errorCode);
-    *outStringP = scr.toJsonV1();
-  }
-  else if ((ciP->restServiceP->request == UpdateContextSubscription) || (ciP->restServiceP->request == Ngsi10SubscriptionsConvOp))
-  {
-    UpdateContextSubscriptionResponse ucsr(errorCode);
-    *outStringP = ucsr.toJsonV1();
-  }
-  else if (ciP->restServiceP->request == UnsubscribeContext)
-  {
-    UnsubscribeContextResponse uncr(errorCode);
-    *outStringP = uncr.toJsonV1();
-  }
-  else if (ciP->restServiceP->request == UpdateContext)
-  {
-    UpdateContextResponse ucr(errorCode);
-    bool asJsonObject = (ciP->uriParam[URI_PARAM_ATTRIBUTE_FORMAT] == "object" && ciP->outMimeType == JSON);
-    *outStringP = ucr.toJsonV1(asJsonObject);
-  }
-  else if (ciP->restServiceP->request == NotifyContext)
-  {
-    NotifyContextResponse ncr(errorCode);
-    *outStringP = ncr.toJsonV1();
-  }
-  else
-  {
-    OrionError oe(errorCode);
-
-    LM_T(LmtRest, ("Unknown request type: '%d'", ciP->restServiceP->request));
-    ciP->httpStatusCode = oe.code;
-    *outStringP = oe.setStatusCodeAndSmartRender(&ciP->httpStatusCode);
-  }
-}
diff --git a/src/lib/rest/restReply.h b/src/lib/rest/restReply.h
index 3272087472..7b58eb64a9 100644
--- a/src/lib/rest/restReply.h
+++ b/src/lib/rest/restReply.h
@@ -40,10 +40,4 @@ extern void restReply(ConnectionInfo* ciP, const std::string& answer);
 
 
 
-/* ****************************************************************************
-*
-* restErrorReplyGet - 
-*/
-extern void restErrorReplyGet(ConnectionInfo* ciP, HttpStatusCode code, const std::string& detail, std::string* outStringP);
-
 #endif
diff --git a/src/lib/serviceRoutines/badRequest.cpp b/src/lib/serviceRoutines/badRequest.cpp
index 57ed2c75a3..2928892923 100644
--- a/src/lib/serviceRoutines/badRequest.cpp
+++ b/src/lib/serviceRoutines/badRequest.cpp
@@ -53,7 +53,8 @@ std::string badRequest
 
   alarmMgr.badInput(ciP->ip, details);
 
-  restErrorReplyGet(ciP, SccBadRequest, ERROR_DESC_BAD_REQUEST_SERVICE_NOT_FOUND, &answer);
+  OrionError oe(SccBadRequest, ERROR_DESC_BAD_REQUEST_SERVICE_NOT_FOUND);
+  ciP->httpStatusCode = SccBadRequest;
 
-  return answer;
+  return oe.toJson();
 }