error - not enough space. help me

[ivhb]

hi, all

FTP 1,0: Could not map table file.
"/etl/dsadm/Ascential/DataStage/Datasets/lookuptable.20080118.zv50ydd
(size 628697120 bytes)": Not enough space.
Error finalizing / saving table /tmp/dynLUT14911561134353d.

when i ran the job, i got this error message as listed above.
when this error occured, i used "df -kv" to monitor the filesystems wheres /tmp and /etl/dsadm/Ascential/DataStage/Datasets/lookuptable.20080118.zv50ydd exists. their disk usage percent Never exceeded 65%.
also, i checked the limits of user process by "ulimit -a", there's no memory limit and no file limit. vmstat also said, there was enough physical memory when the error was reported.
i'm rather confused, how can this happen? what does the error message mean?

thanks a lot for any advice.

os version: aix 5
ds version: ds 7.5x parallel

[ray.wurlod]

Read the error mesage more carefully. It's the /tmp file system that filled.