Full_Name: plop Version: OS: ubuntu last release URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (83.206.236.129)

This is what I got on a CLI:

ldapsearch -x -H ldap://10.1.9.100 -D "cn=admin,o=calculus" -LLL -W -b "ou=Users,ou=toto,ou=Customers,o=calculus" -w passadmin ldapsearch: /build/buildd/openldap-2.4.23/clients/tools/common.c:1363: tool_bind: Assertion `passwd.bv_val == ((void *)0) && passwd.bv_len == 0' failed. Abandon

You're passing both -W and -w, which are mutually exclusive. p.