I made a cube and put photos on the six faces of the cube by utilizing Title Studio. Then I can reopen the veg file for the cube. Also, I made the same cube by utilizing the Track Motion and there is no problem to reopen the veg file for the cube.
I used the veg file and changed the photos to video clips and saved the veg file. However the veg file can not be opened, I tried several times and tried to render it only to fail. Vegas Pro was stuck while opening the project (at 25%, e.g.).
My conclusion: Vegas Pro 16 Suite can not handle a cube attached videos on the faces.
Is there anybody who can let me know I am wrong?