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[Samba] Update samba and Debian

Hello list, I want to make a new domain with the following features, using debian 9 with samba 4.7.3, at the beginning everything went well, but I have a doubt when in the configuration it is requested what type of server to choose, I would like to use the option NONE , then install a bind and configure it myself, all that is fine, but I have a doubt, when I run the command ./samba_update --verbose, I get the following ....... I would like to know what I have wrong or what's wrong with that output, I'll only show a part, I'd like to know if that output is correct and the error it gives to what should be
need cache add: A ccmg7.eccmg.cupet.cu x.x.x.x
Looking for DNS entry A ccmg7.eccmg.cupet.cu as ccmg7.eccmg.cupet.cu.
need cache add: A eccmg.cupet.cu
Looking for DNS entry A eccmg.cupet.cu as eccmg.cupet.cu.
need cache add: SRV _ldap._tcp.eccmg.cupet.cu ccmg7.eccmg.cupet.cu 389
Looking for DNS entry SRV _ldap._tcp.eccmg.cupet.cu ccmg7.eccmg.cupet.cu 389 as _ldap._tcp.eccmg.cupet.cu.
Checking 0 100 389 ccmg7.eccmg.cupet.cu. against SRV _ldap._tcp.eccmg.cupet.cu ccmg7.eccmg.cupet.cu 389
need cache add: SRV _ldap._tcp.dc._msdcs.eccmg.cupet.cu ccmg7.eccmg.cupet.cu 389

1 DNS updates and 0 DNS deletes needed
Traceback (most recent call last):
 File "./samba_dnsupdate", line 863, in 
 creds = get_credentials(lp)
 File "./samba_dnsupdate", line 204, in get_credentials
 raise e
samba.NTSTATUSError: (-1073741811, 'An invalid parameter was passed to a service or function.')
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