SimpleLdapException: Operations error in SimpleLdap::ldap_list() (line 842 of /var/www/erpal/sites/all/modules/simple_ldap/SimpleLdap.class.php).

I have the same issue. Any idea??
Thanks

I had the same problem until i discovered the code in SimpleLdapServer.class.php is wrong and always turns on ldap referrals, even if you set the "Follow LDAP referrals" checkmark off in Modules -> Simple LDAP -> Configure -> Advanced.

If you try to perform the searches on Windows 2003 Server Active Directory or above, it seems that you have to set the
LDAP_OPT_REFERRALS option to 0.
Without this, you will get "Operations error" if you try to search the whole AD (using root of the domain as a $base_dn).

Change the line
$opt_referrals = variable_get('simple_ldap_opt_referrals', TRUE);

to
$opt_referrals = variable_get('simple_ldap_opt_referrals', FALSE);

The TRUE in that line is the default if the variable is not set in the database. Changing it to FALSE will have no effect. The right thing to do here is uncheck it in the admin page.

Yes, that's exactly my point. TRUE should not be the default for this.

The default value for LDAP_OPT_REFERRALS is 1, which is why TRUE is used as the default here. This issue is specific to Active Directory, and the correct way to handle it is to uncheck the option in the admin page.

I'm sorry to disagree with you, but if i check or uncheck the value in the admin page, this line
$opt_referrals = variable_get('simple_ldap_opt_referrals', TRUE);
will always result to TRUE.

The code should read $opt_referrals = variable_get('simple_ldap_opt_referrals', FALSE);