XCTU error SerOpenPort failed: :31

When I try to discover radios in XCTU I get this error. RealPort appears to be installed and working… at least in Device Manager - no errors.

which radios are you trying to discover with XCTU?

XBee Pro 900HP radios.

I did find the problem… I had to enable serial access on the ConnectPort X2 Gateway.

Thanks for the reply.