There is enough energy but it can't spawn creep.
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 Below is my spawn and extensions.  And I get the energy cost of each body part on the document api.  Below is my body part for the creep. ["work","move","carry","work","move","carry","work","move","carry","work","move","carry","work","move","carry","work","move","carry","work","move","carry","work","move","carry","work","move","carry"] Need energy: 1800 Room available energy: 1800 It return -6 when I call the spawnCreep method.  Below is my code for caculate the body part of spawn creep.    
 
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 How much is .energyAvailablein this room?