diff --git a/src/ccontrol/MergingHandler.cc b/src/ccontrol/MergingHandler.cc
index e9935b7f4..45e76291b 100644
--- a/src/ccontrol/MergingHandler.cc
+++ b/src/ccontrol/MergingHandler.cc
@@ -419,23 +419,27 @@ bool MergingHandler::flush(int bLen, BufPtr const& bufPtr, bool& last, int& next
             };
             bool success = false;
             if (!_response->result.fileresource_xroot().empty()) {
-                success = ::readXrootFileResourceAndMerge(
-                        _response->result, [&](char const* buf, uint32_t messageLength) -> bool {
-                            if (_response->result.ParseFromArray(buf, messageLength) &&
-                                _response->result.IsInitialized()) {
-                                return mergeCurrentResult();
-                            }
-                            throw runtime_error("MergingHandler::flush ** message deserialization failed **");
-                        });
+                success = _noErrorsInResult() &&
+                          ::readXrootFileResourceAndMerge(
+                                  _response->result, [&](char const* buf, uint32_t messageLength) -> bool {
+                                      if (_response->result.ParseFromArray(buf, messageLength) &&
+                                          _response->result.IsInitialized()) {
+                                          return mergeCurrentResult();
+                                      }
+                                      throw runtime_error(
+                                              "MergingHandler::flush ** message deserialization failed **");
+                                  });
             } else if (!_response->result.fileresource_http().empty()) {
-                success = ::readHttpFileAndMerge(
-                        _response->result, [&](char const* buf, uint32_t messageLength) -> bool {
-                            if (_response->result.ParseFromArray(buf, messageLength) &&
-                                _response->result.IsInitialized()) {
-                                return mergeCurrentResult();
-                            }
-                            throw runtime_error("MergingHandler::flush ** message deserialization failed **");
-                        });
+                success = _noErrorsInResult() &&
+                          ::readHttpFileAndMerge(
+                                  _response->result, [&](char const* buf, uint32_t messageLength) -> bool {
+                                      if (_response->result.ParseFromArray(buf, messageLength) &&
+                                          _response->result.IsInitialized()) {
+                                          return mergeCurrentResult();
+                                      }
+                                      throw runtime_error(
+                                              "MergingHandler::flush ** message deserialization failed **");
+                                  });
             } else {
                 success = mergeCurrentResult();
             }
@@ -461,6 +465,16 @@ bool MergingHandler::flush(int bLen, BufPtr const& bufPtr, bool& last, int& next
     return false;
 }
 
+bool MergingHandler::_noErrorsInResult() {
+    if (_response->result.has_errorcode() || _response->result.has_errormsg()) {
+        _setError(_response->result.errorcode(), _response->result.errormsg());
+        LOGS(_log, LOG_LVL_ERROR,
+             "Error from worker:" << _response->protoHeader.wname() << " in response data: " << _error);
+        return false;
+    }
+    return true;
+}
+
 void MergingHandler::errorFlush(std::string const& msg, int code) {
     _setError(code, msg);
     // Might want more info from result service.
diff --git a/src/ccontrol/MergingHandler.h b/src/ccontrol/MergingHandler.h
index bddbdbd73..dd387ece2 100644
--- a/src/ccontrol/MergingHandler.h
+++ b/src/ccontrol/MergingHandler.h
@@ -100,6 +100,7 @@ class MergingHandler : public qdisp::ResponseHandler {
     void _setError(int code, std::string const& msg);    ///< Set error code and string
     bool _setResult(BufPtr const& bufPtr, int blen);     ///< Extract the result from the protobuffer.
     bool _verifyResult(BufPtr const& bufPtr, int blen);  ///< Check the result against hash in the header.
+    bool _noErrorsInResult();  ///< Check if the rsult message object has no errors, report the ones (if any).
 
     std::shared_ptr<MsgReceiver> _msgReceiver;           ///< Message code receiver
     std::shared_ptr<rproc::InfileMerger> _infileMerger;  ///< Merging delegate