On ORA-14400: inserted partition key does not map to any partition using ImpDp (Data Pump)

After I have exported my partitioned tables I had to import into development database.
The command I used was (the dmp file was located on default DATA_PUMP_DIR directory):

impdp system@MY_DEV_INSTANCE dumpfile=20120312_SCHEMANAME_TABLENAME.dmp TABLE_EXISTS_ACTION=TRUNCATE

but the following error was found:

ORA-14400: inserted partition key does not map to any partition

This happens when some datas have to be inserted into a partition but that partition doesn't exist. My SCHEMANAME.TABLENAME table was already created last month but impdp was not able to create the missing partitions.
I solved simply dropping and creating again my table from the dump itself with the following command:

impdp system@MY_DEV_INSTANCE dumpfile=20120312_SCHEMANAME_TABLENAME.dmp sqlfile=SCHEMANAME_TABLENAME.ddl

Then I modified the SCHEMANAME_TABLENAME.ddl file adding a "future" partition:

CREATE TABLE "SCHEMANAME"."TABLENAME"
   (    ....
        ....
   )
  TABLESPACE "TSD_SCHEMANAME"
  PARTITION BY RANGE ("CALLDATA")
  (     ....
        ....
   PARTITION "P20120311"  VALUES LESS THAN (TO_DATE(' 2012-03-12 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIAN'))
    TABLESPACE "TSD_SCHEMANAME" COMPRESS ,
   PARTITION "P20120312"  VALUES LESS THAN (TO_DATE(' 2012-03-13 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIAN'))
    TABLESPACE "TSD_SCHEMANAME" COMPRESS,
  PARTITION P20150101 VALUES LESS THAN (MAXVALUE)
    TABLESPACE "TSD_SCHEMANAME" COMPRESS);

In this way the second attempt to complete the import worked as expected.