Unable to establish connection with data source. Missing settings: {[DBCName]}

Connectivity
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Unable to establish connection with data source. Missing settings: {[DBCName]}

I'am installed Teradata driver on CentOS as described in official README.
Drivers is located in /opt/teradata/client

/ODBC_32/
/ODBC_64/

 

Each folder has subfolders and files

include
lib
locale
odbc.ini
odbcinst.ini

 

Using ODBC_64 driver, I'am copied contents from odbc.ini and odbcinst.ini to /etc/odbc.ini and /etc/odbcinst.ini files respectively.

Now in /etc/odbc.ini

[ODBC]
InstallDir=/opt/teradata/client/ODBC_64
Trace=no
Pooling=yes

[ODBC Data Sources]
Teradata_ODBC_DSN=Teradata Database ODBC Driver 16.20

[Teradata_ODBC_DSN]
Description=Teradata Database ODBC Driver 16.20
Driver=/opt/teradata/client/ODBC_64/lib/tdataodbc_sb64.so
DBCName=My_Teradata_Server_IP
UID=
PWD=

in /etc/odbcinst.ini

[ODBC Drivers]
Teradata Database ODBC Driver 16.20=Installed

[Teradata Database ODBC Driver 16.20]
Description=Teradata Database ODBC Driver 16.20
Driver=/opt/teradata/client/ODBC_64/lib/tdataodbc_sb64.so
CPTimeout=60

 

But when I test connection with command

isql -v Teradata_ODBC_DSN

it show me an error 

[08001][unixODBC][Teradata][ODBC] (10380) Unable to establish connection with data source. Missing settings: {[DBCName]}

DBCName option is filled as you can see above. Can you help me understand, why such error is appear?