Advanced Frequency Sweep errors in AWR MWO

Slot Antenna:EM_CURRENT(1,0,1,0,T,0,1,1,20,1)[T]
8:43:19 Error computing annotation
Simulation - LIN: Antenna.SFDOC
8:43:19 Failed to marshal output interface pointer
8:43:19 Current annotations are not available while Advanced Frequency Sweep Option is enabled