dieter@dkluenter.de wrote:

Full_Name: Dieter Version: 2.4.39 OS: openSuse-13.1 URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (62.226.250.246)

When slapd configured with database ldap only, an error occurs,

gdb) bt #0 0x00007ffff7bb8038 in get_token (sp=sp@entry=0x7fffffff9590, token_val=token_val@entry=0x7fffffff9598) at schema.c:1018 #1 0x00007ffff7bbc6f2 in ldap_str2objectclass (s=s@entry=0x7 <Address 0x7 out of bounds>, code=code@entry=0x7fffffff95f4, errp=errp@entry=0x7fffffff95f8, flags=flags@entry=63) at schema.c:2461 #2 0x00005555555e7c1c in register_oc (def=0x7 <Address 0x7 out of bounds>, soc=0x7ffff30a59d0 <pcocs+112>, dupok=dupok@entry=1) at oc.c:917 #3 0x00005555555935ee in init_config_ocs (ocs=ocs@entry=0x7ffff30a5960 <pcocs>) at config.c:556 #4 0x000055555558bf18 in config_register_schema (ct=0x7ffff30a54c0 <pccfg>, ocs=0x7ffff30a5960 <pcocs>)

The trace indicates something initializing the proxycache overlay, which contradicts your statement that only back-ldap was configured.