Volume could not be found error

When recording a custom hybrid, you may get the error message: "Could not record the disc because the volume could not be found" 

Here is the solution from Roxio.

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Toast:  How to Make a Custom Hybrid CD on OS10.3

From: Roxio Technical Support

The information in this article applies to:
Toast 5 Titanium
Toast 6 Titanium

Applicable Operating Systems:   Mac OS 10.3.x

Issue:   When creating a Custom Hybrid with shared data, Toast gives you an error "The volume could not be found."

Cause:   OS 10.3.x changed the way that Toast 5 and Toast 6 handled disk images.  The workaround is to create the temporary partition (disc image) in Disk utility and use it in Toast.

Resolution:

1. Launch Disk Utility, it is located in:
//Applications/Utilities/Disk Utility

2. At the top of the Disk Utility window, click on New Image

3. A Save As: box shows up.  Name the disk image and select the Desktop as the destination.  Adjust the Size of the Disk Image so that it can fit all of your Mac Data and ISO 9660 Data.

4. Select Create (this will mount a disc image on your desktop).

5. Close Disk Utility.

6. Drag the Mac data into the New Image on your desktop.

7. Launch Toast and Select "Custom Hybrid"

8. Press the Select Mac... button and select the image that you just created

9. Press the Select ISO... button and drag in the same partition (if you want to share data).