Server Utilities :: Exporting / Importing Partitioned Table

I am trying to export a partition of a table and import it to another database. I get the below error when I try to import.

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

If I export the table(for that particular partition) and import the table(after dropping the table) in destination, the partitions and sub partitions are created without any problem.

The table is Range Partitioned and Sub partitioned in List. So I had to perform the below operation if I want to retain other data in the Destination table.

1. Drop the existing partition
2. Create the partition and sub partition, same as source
3. Execute imp

In fact I had to perform step#2, as if I split the partition also, the sub partition gets replicated in the new partition, which again throws the same error. Is there better way of managing the partitions and subpartition in destination with exp/imp utility, so that I need not perform step#1 and step#2 manually.