DS 4.5 crashes when rendering an mov and pngs aren't working
I moved my animation to DS 4.5, so I can't go back to 4 and now I've discovered that 4.5 won't render an mov. It crashes every time with the message: "Error saving the file: [path and name of my file] The render could not be saved. Try again or choose a new file name." I've tried many times with different simple file names. One work around for me would be to render a series of pngs because I need an alpha channel. Although the pngs do render, but they are flattened onto the background. Is there some way to tell DS 4.5 to drop out the background?