ORA-39095: Dump file space has been exhausted

Problem Description:

datapump export got following error:
ORA-39095: Dump file space has been exhausted: Unable to allocate 4096 bytes


Cause of the Error:

Note that %U specification for the dump file can expand up to 99 files.
If 99 files have been generated before the export has completed, it will again return the ORA-39095 error. 
 

Solution of the Error:

Use a bigger filesize value.