Node set assembly__pickedset has not been defined?

[comawhite]

Hi,
it seems a simple problem but i don't know the answer. Simply i modelled a rectangular prism solid constrained as encastre at one end, and i wanted to load torsional moment, i made a reference point for the moment at the free end surface center and applied. When i submitted the job, it was aborted due to the following errors and warnings:

ERROR:Node set assembly__pickedset7 has not been defined
Analysis Input File Processor exited with an error.

WARNINGS:Node set assembly__pickedset7 has no members and will be ignored. Nodes defined in this set may have been deleted because they were not connected to any elements.

What can i do to solve? Thanx..

 

[gurmeet2003]

comawhite,

Do you have a coupling between the reference point and the adjoining surface?

Gurmeet