iFolder tsa and returnChildTerminalNodeNameOnly flag as False

I cannot succeed to restore files with tsaif if the backup is done with
returnChildTerminalNodeNameOnly flag as False;
If I do that, NWSMTSWriteDataSet returns FFFEFFB1 and I have to restart
smdrd and reload tsaif

Note 1: If tsaif backups with returnChildTerminalNodeNameOnly flag as True
and I use parentHandle to restore, it works fine.
Note 2: Tsafs allows to backup and restore with
returnChildTerminalNodeNameOnly flag as False;

I noticed too that NBackup saves ifolder files with
returnChildTerminalNodeNameOnly flag as True.
Moreover, Novell iFolder 3.x Administration Guide (7.6.8 TSAIF and NBackup
Examples) shows examples about subdirectory restoration but nothing about
files restoration

So, does tsaif allowed to backup and restore ifolder files with
returnChildTerminalNodeNameOnly flag as False ?
If yes, any ideas to solve my problem ?
If not, is it a bug or a tsaif limitation ? is there documentation about that?

I am working with
OES SP2
ifolder3-enterprise 3.2.5347.1.1
ifolder3-tsa 3.2.5347.1.1
novell-sms 1.1.4-13
novell-smscomp-devel 2006.12.18-1Linux

Thank for your help

Tina