How to insert from Java a new JMSproperty in header? setStringProperty() does not work

[BenXS]

I am trying to set from a Java bean a new (additional) Property in header.
Therefore I code (simplified) the following:


public void pass(Message mess) {
   ...
   mess.setPropertiesModifiable(true);
   mess.setStringProperty("newprop", "value123");
   ...}
   
But it didn't work.

Compiler complains about cannot find symbol for "setPropertiesModifiable".

If omit it the setPropertiesModifiable() statement then at runtime I get an
exception
java.jms.MessageNotWriteableException: Message properties are read only

So how do I resolve that?

Ben
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