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How to make a missing file check

Is it a way to make a game check for files to be missing, so if a file is missing or replaced, the game will not start?

Product Version: UE 4.19
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asked Jun 14 '18 at 08:46 PM in Packaging & Deployment

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avatar image mightyenigma Jun 18 '18 at 06:48 PM

Not sure if Ue4 comes with basic file I/O library, but I heard of something called Rama's Victory Plugin in the Unreal Marketplace that I think I heard can do that sort of thing.

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I'm a massive fan of Rama's Save Plugin (which contains some of the Victory code/nodes) and that certainly simplifies things in my projects.

But if you're wanting a built-in UE4 approach, you might want to investigate the FPlatformFileManager class and its useful functions. Here's a Wiki article with some examples.

You could use the section on checking for a File Size and if it returns 0, you know the file does not exist.

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answered Jun 19 '18 at 01:39 PM

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avatar image Blackforcedragon Jun 19 '18 at 01:50 PM

is this possible in Blue Prints?

avatar image Jawdy Jun 19 '18 at 02:07 PM

It doesn't look like FPlatformFileManager is Blueprint accessible, so I'd highly recommend you take a look at Rama's Victory Plugin.

On that page he has a link to the Forum post outlining how to install it, use it, what nodes it adds etc.

avatar image Blackforcedragon Jun 19 '18 at 02:09 PM

Ok, thanks for the help, i will try it out later and see if it works

avatar image mightyenigma Jun 19 '18 at 03:25 PM

You can make anything that is in C++ be Blueprint-accessible. You just have to add an H and a CPP file to define the blueprint node and a wrapper function to access the C++ stuff with it, and compile that new C++ class

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