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OK I already managed to solve it .... the issue comes from the fact that both subscribers (ROSTextView) are calling the same class from source. In that class, the NodeName is defined as "ros_text_view", so if multiple subscribers call it, they will both have the same NodeName, which is not allowed in ROS.

The solution to this comes from this answer

simply by creating two separate NodeConfigurations, and assign a new NodeName for each (or at least one of them) , this way, there will be no Name Conflict