TOOMANYSPACEVAL

Invalid Spacing size used, only first 4 values used.

Spacing values follow CSS syntax, this means you can specify 1, 2, 3 or 4 values but not more. This error occurs when you set more than 4 values on either margin or padding.

For instance, the following will fail:

<Grid margin="0 0 L 0 0" />

but this would succeed:

<Grid margin="0 0 L 0" />

You can read more about gymnast valid spacing formats here