So after having some tests, I narrowed the faulty keys to be VK_OEM_0x and VK_OEM_MINUS which are the following keys on qwerty: -=[]\;'/.

I can't bind anything on them without getting the error code from my initial post.

Do you know a tutorial for editing the file in a text editor? I am not sure I can get the syntax right.

Also switching Y and Z is the standard for German keyboards.

Don't blame MSKLC, but know what it is you're doing. You're apparently trying to put two values into a C variable (VK_Z). Obviously, that won't work. The error is because MSKLC actually helped you see that you messed up. ;-)

Solution: Make sure no more than one key in your layout is marked as VirtualKey Z.

I don't remember which scan codes those keys represent (15 and 2c), but if you don't know what you did wrong yourself you could always look them up. Switching Y and Z was mentioned, so maybe you just forgot to change the Z key to VirtualKey Y?

I can't tell you that anything concerning computers is flawless. This program is free and worth every penny, sure.

But instead of blaming the program for your beginner mistakes, try to educate yourself. Sorry, but layout editing for the populace isn't something Microsoft chose to put a lot of money in so Michael Kaplan has had to provide what support he could pretty much alone. For the money, it's an amazing tool!

Your problems seem to stem from not understanding the underlying mechanisms of layout programming. Consider someone firing up Photoshop without any knowledge of image processing, and blaming the program for being complex and confusing...

Sure, binding a VK_ to two keys is in fact an error while binding a character to multiple keys isn't (but the program chooses to warn you nevertheless, in case you didn't intend to – isn't that nice?).

I don't know which key is above Enter on your board. Do you mean the Backspace key? If so, sure, that isn't a key that normal layouts remap to glyphs (you can still do it using MSKLC but it'll take editing of temp files and manual compiling from there). If you mean the ANSI backslash key, that's entirely doable if you know what you're doing (such as selecting an ANSI physical layout).

If you don't want help, that's fine. Best of luck to you! But if that's the case, you shouldn't have used other people's time with your blazing guns. Just find out things yourself, that's what I had to do for the most part.

I know the answer to your latest comment, but I don't like your complete lack of politeness and humility so I'm inviting you to stop complaining now. Yes, it can be confusing if you don't know the answers and some things in the Microsoft world (and other places) are still far too QWERTY-centric. But I repeat: This program is free. If you don't like it, you've already gotten your money back. So behave please.