Unable to connect to SPD data socket

[muny]

Have anyone encounter the following error before when running in DI studio ?

ERROR: Unable to connect to SPDS data socket.
ERROR: The connection was refused

Note:
Sometimes when I run the job, it is successful, but sometimes it encounter the following.
My DDS (Detail Data Store) is using SPDS Message was edited by: muny

[SASKiwi]

I suggest you raise this with Technical Support as your message is the second in the past few months on this specific issue and the first one did not get resolved.