EXP-00002: error in writing to export file

While exporting table or schema using exp/imp utility you may come across below error.

Most of the time this error occurs due to insufficient space available on disk.so confirm space is available where you are taking taking export dump and re-run export.

[oracle@DEV admin]$ exp test/test@DEV tables=t1,t2,t3,t4 file=exp_tables.dmp log=exp_tables.log

Export: Release 9.2.0.8.0 - Production on Thu Sep 10 12:25:52 2015

Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.

Connected to: Oracle9i Enterprise Edition Release 9.2.0.8.0 - Production

With the Partitioning, OLAP and Oracle Data Mining options

JServer Release 9.2.0.8.0 - Production

Export done in US7ASCII character set and AL16UTF16 NCHAR character set

About to export specified tables via Conventional Path ...

. . exporting table t1 1270880 rows exported

. . exporting table t2 2248883 rows exported

. . exporting table t3 2864492 rows exported

. . exporting table t4

EXP-00002: error in writing to export file

EXP-00002: error in writing to export file

EXP-00000: Export terminated unsuccessfully

I hope this article helped you. Your suggestions/feedbacks are most welcome.
Keep learning... Have a great day!!!