229 - Could not open or create a temporary file.

Hi I have a Informix 11 running on linux and I am trying to run below command

dbschema -d db01 > t

and getting below error and I did grant dba to the mentioned user

DBSCHEMA Schema Utility INFORMIX-SQL Version 11.70.FC5DE
grant dba to "user01";

-229 - Could not open or create a temporary file.
-131 - ISAM error: no free disk space


How to fix this

Thanks and Regards