rpl calculate error
 

i m trying to calculate rpl with cyclone box always giving server error like this (Started DCT4 RPL Calculation procedure at 4:41:10 PM
Handling device: [Cyclone Team], [Cyclone Box]
Service Tag: 3FC8553C3BB6A0C91BA6918F535D7089
Cyclone Server (1.0.0.478), Cyclone Box Team 2008, 2009 - Ready.
Cyclone Server Send Command Error -> Code: 500, Calculation problem (Unknown)
Failed to Calculate DCT4 RPL -> Server transaction failed)