How to use

getErrorMessage

method

in

org.eclipse.debug.ui.AbstractLaunchConfigurationTab

@Override
public String getErrorMessage() {
  if (fSourceLookupPanel != null) {
    return fSourceLookupPanel.getErrorMessage();
  }
  return super.getErrorMessage();
}
/* (non-Javadoc)

setErrorMessage(tab.getErrorMessage());
return false;