We used the messager like this $.messager.alert("Error", msg, "error");
If we used the message like this all is fine
"HTTP Status 500 - error executing work<br>Caused by:<br>Objektname"
But if we use the following text with Notation in XML for special characters, the html tags not correct used. The break tag is shown here as text <br> in the alert window.
"HTTP Status 500 - error executing work<br>Caused by:<br> Objektname"