Jane

That worked!!! Thanks, Igor, you're a star!!

Thanks again, Dave

Here's the WeTransfer link: https://wetransfer.com/downloads/efa9966b90f7296a13f29b219a69603a20230918124704/3f293051d79f56aa9c659810ce03903620230918124704/7099bc It would take a long time to send the whole project, so I made a new project in v11.0.9 Beta to illustrate the problem. Each slide contains a simple text object with the name of the transition that is (supposed to be) on that slide. The previews all play perfectly in Slide Options, but apart from Cube 3D, they don't work when running the sequence - at least not on my computer! The next step would be to uninstall PTE AV Studio and then reinstall v11.0.9 Beta, but I haven't done that yet, because I don't have a copy of my original licence key - how do I get a new key to use after the reinstallation? Jill: I was careful to close down all applications before updating Windows!

Hi Igor, Thanks for replying, I hope all is well with you. No need to apologise - I suspect the problem lies with the recent Windows automatic update rather than with PTE. Everything was working perfectly in v11.0.8 until the update. Then the problem started as I described above and also occurs in v11.0.9 Beta. I tried creating a new project, as Dave suggested, but had the same problem. I rescued my original project by choosing a different transition (Shapes) for the slide in question and was able to save it and create an MP4 file as usual. It would be interesting to know if anybody else has found the same problem after installing the latest Windows update, or perhaps it's just me.

Thanks, Dave, I'll try that.

My PTE Version 11.0.8 seems to have developed a problem with the AV I'm working on at the moment. In the Slide Options>Transition, all the options below Displacement Map in the list have stopped working and instead of the expected transition, they've all defaulted to Slide. It's not just new transitions that are affected - slides that already used any of those options are now using Slide instead. Following a suggestion on another forum, I have now installed Version 11.0.9, but that made no difference. I don't know if it's relevant, but there was a Windows update yesterday (Windows 10) and the problem seems to have started since then. Can anybody help, please?