ldap_add: Invalid DN syntax (34)

I am configuring my LDAP for roaming profiles using autofs, but when I run this command

ldapadd -x -D "cn=admin,dc=example,dc=com" -W -f automount.ldif

I get this error message

ldap_add: Invalid DN syntax (34) additional info: invalid DN

I have googled lots of forums but still didn't find the solution, hopping I might find it here.

Solution 1:

Missing automount schema: you need to import beforehand

rfc2307bis.schema

which defines automountMapName attribute.