Yes, that could be the issue. Check the URL: http://www.symantec.com/docs/TECH220104
I would normally add a DataFile in such situation via sqlplus on the Oracle Box.
Example:
ALTER TABLESPACE "USERS"
ADD
DATAFILE 'E:\oracle\product\10.2.0\oradata\protect\USERS05.DBF' SIZE 138240K
REUSE AUTOEXTEND
ON NEXT 10240K MAXSIZE 32767M;
Reference:
http://www.symantec.com/docs/TECH220104