Very Urgent ,Help me

Hi,

I got a problem of error ora 1658.

Please tell me what are the best ways to solve this problem.

Tell me the step.
THe problem is like this.

, "unable to create INITIAL extent for segment in tablespace %s"
// *Cause: Failed to find sufficient contiguous space to allocate INITIAL

//          extent for segment being created.


// *Action: Use ALTER TABLESPACE ADD DATAFILE to add additional space to the

//          tablespace or retry with a smaller value for INITIAL