Hello. I'm using SQLDeveloper for coping my database from one server to another. So I choose Tools->Database Export..., then connection and couple of options (like this one  
https://docs.oracle.com/cd/E17781_01/server.112/e18804/impexp.htm#BABHFHGH ). The resulting SQL not working, cause it contains NOPARALLELALTER (that means, I guess, NOPARALLEL; ALTER) and not contains semicolons.
Tell me please, Tom, what I do wrong?
This is a fragment from my export.sql:
CREATE TABLE APPEAL_TRANSFER 
(
  MESSAGE_ID NUMBER(10, 0) NOT NULL 
, "DATE" NUMBER(10, 0) 
, USER_FROM NUMBER(10, 0) 
, USER_TO NUMBER(10, 0) 
, GROUP_ID NUMBER(10, 0) 
, CONSTRAINT APPEAL_TRANSFER_MESSAGE_ID_PK PRIMARY KEY 
  (
    MESSAGE_ID 
  )
  USING INDEX 
  (
      CREATE UNIQUE INDEX APPEAL_TRANSFER_MESSAGE_ID_PK ON APPEAL_TRANSFER (MESSAGE_ID ASC) 
      LOGGING 
      TABLESPACE USERS 
      PCTFREE 10 
      INITRANS 2 
      STORAGE 
      ( 
        INITIAL 65536 
        NEXT 1048576 
        MINEXTENTS 1 
        MAXEXTENTS UNLIMITED 
        BUFFER_POOL DEFAULT 
      ) 
      NOPARALLEL 
  )
  ENABLE 
) 
LOGGING 
TABLESPACE USERS 
PCTFREE 10 
INITRANS 1 
STORAGE 
( 
  INITIAL 65536 
  NEXT 1048576 
  MINEXTENTS 1 
  MAXEXTENTS UNLIMITED 
  BUFFER_POOL DEFAULT 
) 
NOCOMPRESS 
NOPARALLELALTER TABLE APPEAL_TRANSFER
ADD CONSTRAINT APPEAL_TRANSFER_MSG_FK FOREIGN KEY
(
  MESSAGE_ID 
)
REFERENCES MSG_MESSAGES
(
  ID 
)
ENABLE
Here it is: 
NOPARALLELALTER TABLE APPEAL_TRANSFER
 
Hard to say what's going on without seeing precisely what you're doing... But it could be an issue with the SQL Dev export option. 
Here's some things to check:
- Make sure you're on the latest version of SQL Dev (currently 17.2) 
http://www.oracle.com/technetwork/developer-tools/sql-developer/downloads/index.html - If it still doesn't work:
 - Raise a bug!
 - Try enabling/disabling "Export DDL" options. e.g. do you really need all the storage options?