problem during installation DB instance on SAP ERP 2005

Good evening,
.
I've tried the solutiuon suggested but without result.
export TEMP=/tmp

Same error during sap installation process.

> Subprocess starts at 20070210161611

 Execute Command : /sapdb/programs/bin/dbmcli -n sapserver -d MDB -u
CONTROL,******** load_syst
ab -u SUPERDBA,******** -ud ********
 Start subprocess as user with uid: root

> Subprocess stops at 20070210161612

 ERR
 -24964,ERR_EXECUTE: error in program execution
 1,can not generate temporary file name

I've a look  /sapdb/data/wrk/MDB/knldiag (in attachment), to check errors
but no error found, only a couple of warnings.

Regards.
Luca