Hi Jill - Thanks for that very kind offer. As it turns out, after throwing my arms in the air and giving up, I went back to it like a dog to a bone and I have now managed to successfully build OpenVDB in Windows! It took a few days of troubleshooting but I got there in the end. I can now run OpenVDB from a Windows command terminal and also from a PyCharm terminal. I haven’t looked at trying the Houdini-specific part of it yet but will do so in a few weeks’ time, after a holiday break road trip. I kept a record of all the steps that I took (and revised and retook and revised again etc…and there were an awful lot of them!) and I’ve used that to create a detailed step-by-step installation guide, so that others can avoid the pain of what I’ve been through. I’ve put a pdf of the guide (all 20 pages) into a Dropbox folder, which can be accessed via this link: https://www.dropbox.com/sh/64otu6lstnn1483/AADCOruxLOBwKoIzJOJ05s1Ba?dl=0. Please feel free to distribute this and/or post it on your web site as you see fit (and the same goes for anyone else wanting to share it too). Cheers Ian