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cannot read plan file Archicad 23


I was using Archicad 23, I had removed it from the laptop before. .bak file was giving an error I changed the .bak file extension to .pln file, it gives an error that the plan file cannot be read, what should I do now?

Ekran görüntüsü 2022-03-27 102322.png

Read this helpful guide prepared by @mtron and edited by @Rubia Torres

AC 27 INT 5030/WIN 11
AMD Ryzen 7 5800H with Radeon Graphics 3.20 GHz 16.0 GB

.bak? Not .bpn?


Are not .bak files only generated during the save process and removed after? If AC died mid save I would assume that the .bak file would be incomplete and hence most likely unreadable...




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Laszlo Nagy
Community Admin
Community Admin

I agree with Lingwisyer, a BAK file is not an Archicad Project Backup, you need to look for a file with the same name as your project and having the BPN extension.

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