Bdb error in openldap 2.1.15/16

["De Leeuw Guy" <G.De_Leeuw@eurofer.be>]

Hi,

I try to put with slapadd an ldif file created with slapcat V2.1.12
 and I receive this error :

=> bdb_tool_entry_put( -1, "o=Eurofer,c=be" )
bdb(o=Eurofer,c=be): txn_begin interface requires an environment configured
for the transaction subsystem
=> bdb_tool_entry_put: txn_begin failed: Invalid argument (22)
slapadd: could not add entry dn="o=Eurofer,c=be" (line=21): txn_begin
failed: 
Invalid argument (22)
slapadd shutdown: initiated
====> bdb_cache_release_all
slapadd shutdown: freeing system resources.
bdb(o=Eurofer,c=be): txn_checkpoint interface requires an environment 
configured for the transaction subsystem
bdb_db_destroy: txn_checkpoint failed: Invalid argument (22) ====>
bdb_cache_release_all

It's the first entry of my ldif file.
How can I solve this problem ?

Thanks in advance,

Guy