Convert VECTOR pattern to editable vector objects?

I create a shape, and fill this with the desired vector pattern. When I export this as .eps or .ai and then import into Corel Draw (your approach) or open with Illustrator (as suggested here: https://graphicdesign.stackexchange.com/questions/64147/change-vector-fill-colors-in-corel) , respectively, the pattern is completely lost. There are no objects at all.

I cannot follow the suggestion by Mosh (https://community.coreldraw.com/talk/coreldraw_x3_and_older/f/coreldraw-x3/14673/can-you-change-colors-on-a-vector-pattern), there is no Patterns folder in my installation path and there are no .pat files whatsoever.

I cannot use the 2 color pattern because there is no comparable hatch pattern in these. (suggestion by Ariel https://community.coreldraw.com/talk/coreldraw_x3_and_older/f/coreldraw-x3/14673/can-you-change-colors-on-a-vector-pattern)

I cannot go via Edit --> Find and Replace --> Replace Objects --> Replace Color --> Replace colors used as fills (as suggested here http://support.epiloglaser.com/article/8205/29944/find-and-replace-a-color-in-coreldraw) . This is because corel draw cannot find any objects.

I don't get, how this seemingly easy gaol can be so difficult to achieve.

Any help would be highly appreciated!

Are there any new insights into this issue? Is the a new and easy solution to that?

Bee525 said:

My goal is to change the Black-White hatch  into a Black-Grey hatch

Depending on exactly what you need to do with your graphics, you might consider trying Alexander Penkin's HatchFill macro.

If you have Hatch Fills in a document, then when opening the file at a later time, you will see this message:

Hatch fills are supported natively in Corel Designer. CorelDRAW knows how to do some stuff with them, but not everything.

Another option is to lay out appropriate content in CorelDRAW that you can then use to create your own Vector pattern fill, Bitmap pattern fill, or Two-color pattern fill "from scratch".

Eskimo said:

Another option is to lay out appropriate content in CorelDRAW that you can then use to create your own Vector pattern fill, Bitmap pattern fill, or Two-color pattern fill "from scratch".

As an example...

1. The rectangle with the thin blue outline is 4" x 4". The corner nodes of that rectangle will be used for "Snap to Objects" when defining the pattern fill. I've put it on the Guides layer so that it will not be included in the pattern fill. The corner nodes are located at Document Grid points.
   
   
2. The rectangle filled with light blue is there to provide a background for the hatch.
   
   
3. The diagonal lines are located in such a way that they will match up when the pattern fill is tiled. Snapping to Document Grid was used to locate them correctly with respect to the 4" x 4" rectangle.

Here's a video where I use this to create a vector pattern fill from this content, then change some of the settings for the pattern fill (scaling & rotation). After any such change, the fill could have been saved as a "named" vector pattern fill to use later in other documents.