@MattAng Hi, sorry to hear you had such an issue. My recommendation is to please never save on the same file for a long period of time. It’s best to have multiple backups you can fall back in case there’s a hardware or software malfunction.
Unfortunately if your frames were lost there’s no way to recover them without bringing them from a previous version of the file.
Now as to why these were lost … sometimes depending on the operating system (e.g Windows) the save operation can be interrupted by a permissions problem, an antivirus app can block the program or in other cases a temporary file cleaner can delete your frames without your approval. None of this has anything to do with Pencil2D so we can’t do much about it.
- Please save backup copies of your files as a counter measure
- Follow some of these tips to make Windows more open to let you work with third party apps like Pencil2D [Guide] How to Train Your Pencil2D (Windows)
- If you still lose frames form time to time, try saving a backup copy as a PCL file. This means save your file normally, and then create a new copy by going to
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File > Save As > set the type dropdown to PCL > this will save the file along a DATA folder next to it (which you must not erase) this way you’ll be able to see exactly which files are part of the project.
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I only suggest saving this once in a while because it might not be easy to manage, however it’s the best way to avoid random software from deleting the temporary folder where Pencil2D stores drawings during a work session