Abaqus - error: Unexpected allocation request that exceeds 2gb

Hello, All 

   My abaqus file has shown one error for me---unexpected allocation request that exceeds 2gb. It can't walk out only one step. 

    About 12 million elements were included in my abaqus file. Is there anyone met the similar issue ? Could you share your experience ? 


   Many thanks.

Abaqus ​​​​​​​