BSP Exception for user fields

Hi All,    

          In BSP i am showing all user fields in one view and i am getting below problem(

• The following error text was processed in the system:
  BSP exception: Missing reference when converting data object ZCURR

)

In my analysis..problem is if i add a field to a structure(X) and providing reference table to that field from other table

My structure definition is like this

Structure name ZS_USERFIELDS

here i attached ABAP call stack. Is there anyway to avoid this error(Other than defining a field in same structure for reference field).?