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The wrong validation error is shown in dialog "Create New Binding". 1. Create New Abstract WSDL (just invoke new WSDl File dialog and stay with default values) 2. open wsdl file in wsdl tree view 3. invoke "Add Binding" on "bindings" node 4. check "Add Binding to Service Port". See validation Error: "Binding "newWSDLPortTypeBinding" already exist" !!! Note: But newWSDLPortTypeBinding is still not created. 5. uncheck "Add Binding to Service Port" !!! The error still there 6. Change any name, type or subtype binding parameter - error is dissappeared or changed on the new one.
This old bug may not be relevant anymore. If you can still reproduce it in 8.2 development builds please reopen this issue. Thanks for your cooperation, NetBeans IDE 8.2 Release Boss