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  1. ,

    Check if there is no nexus running. If not, delete sonatype-work/nexus/nexus.lock .

  2. ,

    checkState() is Static convenience methods that help a method or constructor check whether it was invoked correctly (whether its preconditions have been met). This occurs when the precondition does not met.

Solutions on the web

via GitHub by jim618
, 1 year ago
Light box should never be called twice
via Google Groups by Deepak, 10 months ago
instance must be started before calling this method
via GitHub by ligadata-dhaval
, 2 years ago
instance must be started before calling this method
via Google Groups by Rakeshh yalnati, 1 year ago
The path to the driver executable must be set by the webdriver.gecko.driver system property; for more information, see https://github.com/mozilla/geckodriver. The latest version can be downloaded from https://github.com/mozilla/ geckodriver/releases
via Stack Overflow by Eoghan Buckley
, 1 year ago
The path to the driver executable must be set by the webdriver.chrome.driver system property; for more information, see http://code.google.com/p/selenium/wiki/ChromeDriver. The latest version can be downloaded from http://chromedriver.storage.googleapis.com/index.html
java.lang.IllegalStateException: Light box should never be called twice 	at com.google.common.base.Preconditions.checkState(Preconditions.java:176)	at org.multibit.hd.ui.views.components.Panels.showLightBox(Panels.java:312)	at org.multibit.hd.ui.views.SidebarView.handleTreeSelection(SidebarView.java:287)	at org.multibit.hd.ui.views.SidebarView.access$300(SidebarView.java:41)	at org.multibit.hd.ui.views.SidebarView$2.mouseReleased(SidebarView.java:213)