Once in a while I get this message in a drawing:

Solidworks has detected that the units of the drawing differ from some of the components in the assembly. This can affect the display of notes or table cells linked to custom properties assigned to those components in LightWeight. Resolving these components can be time consuming but will update the text correctly.

Would you like to resolve these components?

I have tried to find the problem but am not able to. What does this message refer to and how do I fix it?

Thank you

Paul

Solidworks 2009 SP0