diff --git a/UpdatePTUDevCtrl/ismas/ismas_client.cpp b/UpdatePTUDevCtrl/ismas/ismas_client.cpp
index 6c871ec..603c99a 100644
--- a/UpdatePTUDevCtrl/ismas/ismas_client.cpp
+++ b/UpdatePTUDevCtrl/ismas/ismas_client.cpp
@@ -342,8 +342,11 @@ IsmasClient::sendRequestReceiveResponse(int port, QString const &request) {
                 return std::nullopt;
             }
         } else {
-            printDebugMessage(port, clientIP, clientPort,
-                QString("PARSE ERROR ") + response + " " + parseError.errorString());
+            if (!response.contains("RECORD")) {
+                // maybe APISM does not send valid JSON: "RECORD SAVED" etc.
+                printDebugMessage(port, clientIP, clientPort,
+                    QString("PARSE ERROR ") + response + " " + parseError.errorString());
+            }
             ::close(sockfd);
             return std::nullopt;
         }