You need to create a directory in the database instead of pointing the physical directory path for datapump export
and import
.
Assuming that you have the necessary privilege to create a directory
CREATE OR REPLACE DIRECTORY <directory_name> AS 'e:\_workline\workspace\rfc_16012014\project_staging';
Then grant permission to user to read and write on that directory,
GRANT READ, WRITE ON DIRECTORY <directory_name> TO project;
Mention the created directory name into your Import command and try,
IMPDP project/project DIRECTORY=<directory_name> LOGFILE=project_staging_log.log dumpfile=<DMP_FILE>
Refer here for more in detail.