how to connect multi clock domians to only one scan chain

 Hi All,

I have a design which contains 3 clock domains when i tried to connect a scan chain the DFT enginr of RTL Compiler auto creat 3 different scan chanis can anyone please help me to enforce the engine to create only one chain i tried this command
"connect_scan_chains -chains scan_chain0 -pack ${DESIGN}" but it fails and reported the following error

"Error   : Could not satisfy scan configuration constraints. [DFT-407] [connect_scan_chains]
        : Need additional scan chains.
        : Either define more user-defined scan chains or use the '-auto_create_chains' option with the 'connect_scan_chains' command to automatically create the required number of chains.
Error: Encountered an error during scan configuration
Failed on connect_scan_chains"

Thanks in advance