The following is from a post by Shawn Gilmour in the public discussion groups:
“As you may know service pack 1 for AutoCAD 2004 and AutoCAD LT 2004
encountered a problem with an omitted file required for the HP DesignJet
Windows system printer driver. Based on your feedback we were able to
quickly react to this issue and post a fix within 24 hours for service pack
1. We have now posted service pack 1a that includes the omitted file for HP
DesignJet Windows driver and have tested it extensively with customer beta
sites to ensure the problem is resolved. The AutoCAD team thanks you for
your patience and is committed to providing you with quality products.
Please consult the service pack 1a readme file for more information.
Service pack 1a is available through the LiveUpdate feature in the AutoCAD
2004 / AutoCAD LT 2004 Communication Center or for download at:
http://www.autodesk.com/autocad-updates AutoCAD 2004
http://www.autodesk.com/autocadlt-updates AutoCAD LT 2004