Welcome the the forum....
Not a lot of info to go on.....
Which click event has the error?
Looking at the btnPreview code, I see two errors immediately.
1)
Code:
DoCmd.OpenQuery ([Open Projects Employee])
This is improper syntax. The query name should be a string.
Example:
Code:
DoCmd.OpenQuery "OpenProjectsEmployee"
Also, you should not use spaces in object names.... (I removed them in the example)
2)
The second error is
Code:
DoCmd.OpenForm ("[Open Projects].[Owner]"), acViewPreview
I doubt that you have a form named "[Open Projects].[Owner]".
Again, the form name should be a string, like the form names in the Navigation Pane.