Clips are offline in final export, but are online in the project.

[AdamSkin18]

Apologies the photo isn't very clear. But essentially I have a few clips that say that they are offline in the final exported clip (see left hand side of photo) - yet they are online in the project (see right side). 

I  have created a new sequence a copy and pasted, and this hasn't worked. I have also used previews in the export and this has not worked either. 

[Myra Ferguson]

Are your clips on a networked drive or removable media? Try moving them to your local hard drive:

• Networks and removable media with Digital Video

[Ann Bens]

Delete media cache and preview files and try again.