Hi part,
It could be one of two things, depending on how your disk space is managed for DB2.
If you're using System Managed Space (most likely) a disk drive is full. You'll need to get the system administrator to allocate more space (if it's on a SAN) or move TEMPSPACE1 to a larger device.
If it's DMS, you can alter the tablespace to make it bigger.
db2 alter tablespace <tablespace_name> extend (all <num_pages>)
You can check the space management with:
db2 list tablespaces show detail
Good Luck,
Kent