Ontape won't change logging

Hi I am running Informix Dynamic Server 7.23 UC1 on a IBM RS/6000 with AIS 4.1.4 I load a database named "mbs" without logging. After this, i want to change the logging to unbuffered logging with the command: ontape -s -L 0 -U mbs but it doesn't work - i get following message: Archive failed - Invalid logging change to mbs Program over. Who can help me? Klaus Arlt -- |--------------------------------------------------------------| |Universitaet GH Essen | | | Dezernat 2.6 | | | -Datenverarbeitung- | Tel.: 0201-183-2055 | | Klaus Arlt | Fax.: 0201-183-2008 | |Universitaetsstr. 2 | E-Mail: klaus.arlt@uni-essen.de | |45117 Essen | E-Mail: ydv010@sp2.power.uni-essen.de | |--------------------------------------------------------------|