Error while executing "read database" operator in rapidminer process via jsp

User: "Porkung021"
New Altair Community Member
Updated by Jocelyn

I have a Rapidminer process of classification taking the input with "Read Database" operator. The process is well executed in Rapidminer studio as well as via JAVA class in Netbeans. But when I try to call that java class via JSP, It throws following exception:
com.rapidminer.operator.UserError: The dummy operator Read Database (replacing jdbc_connectors:read_database) cannot be executed.

How can I resolve it?

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    User: "Thomas_Ott"
    New Altair Community Member
    Accepted Answer

    It's not finding the Read Database operator. I usually see these errors w.r.t. to extensions not being installed on RapidMiner Server.