Connectors using CElas1 element

Dear All,

 

I am trying to connect the two tubes using CElas1 element with the PElas property card.

 

But Optistruct shows this error

 

'CELAS1     56812             330  123456   37722  123456'

  *** ERROR # 1000 *** in the input data:
  Incorrect data in field # 5.

 

 

Kindly give your suggestions

 

Thanks

RAM