Dock becomes invisible

Occasionally my dock on my MacBook Pro will just go invisible. You can see the outline of the dock but all the icons disappear. Which means I cannot use any of then. This then means I need to restart the mac. Is there anything I can do to get this sorted out?
Thank you,
Archie

First take a screen shot of your Dock (command-shift-4, hit the spacebar, then click the Dock). Then delete this file:
/Users/you/Library/Preferences/com.apple.Dock.plist.
Then log out and log back in. Your Dock will be reset to the original. Use the screen shot to rebuild it how you like. See if that fixes it.

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