You are trying to join a computer in a specified OU to a domain and receive the following error:
ERROR: Unable to join computer object
ERROR: Could not join to the domain
VAS_ERR_FAILURE: Unspecified failure
VAS_ERR_LDAP: 000020D6: SvcErr: DSID-031006CC, problem 5012 (DIR_ERROR), data 0
LDAP_OPERATIONS_ERROR: LDAP Operations Error
A wrong path to the OU has been specified.
Please specify a correct path the the ou.
Here is an example of the command:
/opt/quest/bin/vastool -u Administrator join -f -c "ou=unix,dc=example,dc=com" example.com
Also ensure the account that is specified after the -u has permissions to create and modify computer accounts.