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I would like to check my document for colors, only I do not get it done as I would like.
1. Registrations marks (spot color all) is reported as error, but this is correct and I do not want the error.
2. NChannel (multiple process color) Color space CMYK, channel black; is also indicated as an error, but this is not a problem and I do not want this as a error.

I just want an error if there are objects that are RGB or CMY are LAB colors.
Black/gray/nchannel black are oke and not wrong i my case.

So please help me!

There are probably several ways to do this, but the most flexible will be with an Action List.
The checks for RGB and Lab can be done with a simple "Check color type". The check for CMY is a bit more complex - but don't worry it's not that hard to understand.
We're going to use a combination of select actions with "Log selection". Note that there is a "Select color range", which can select all objects with a color in a specific range. If you set this to CMYK, and set the ranges as: C 0-0; Y 0-0; M 0-0; K 0-100, then it will select all CMYK objects with only K. But we want to give an error if there are objects with the inverse of that: objects with have C, M and/or Y. This can be achieved by following the select with a NOT operator:

Select by color range
NOT

The problem here is that NOT inverses *all* selections, meaning that everything that was not selected now *is* selected. This includes all non-CMYK objects, and hence includes gray objects. To prevent that, we can explicitly select all CMYK objects, and combine them using AND:

Select by color range
NOT
Select by color space (CMYK)
AND

Adding a Log selection and the checks for RGB and Lab gives the complete Action List:

Select all
Check color type (RGB)
Check color type (Lab)
Select by color range (C 0-0; M 0-0; Y0-0; K 0-100)
NOT
Select by color space (CMYK)
AND
Log selection

You may need to repeat the CMY part of the Action List to cover all types (fill, stroke, images).