Hello, The attribute type description, as per RFC2252, requires a space before the closing parenthesis. It might be what's causing the error.
I'd also note it's generally recommended to use slaptest (as documented) to convert existing schema files to LDIF format, to avoid errors such as this.
--Quanah -- Quanah Gibson-Mount Product Architect Symas Corporation Packaged, certified, and supported LDAP solutions powered by OpenLDAP: <http://www.symas.com>