klsmn

So I figured out it's probably an issue with low quality font file as you can see in attached .gif animation.
Some letters contain abandoned nodes, namely lowercase a, c, d, e. When I removed those, adding and substracting the curves was a breeze.
I'd personally rather avoid this font.
Have a nice day.

 
Edit: A little workaround is as follows: after converting text to curves, just export the whole document as pdf/x-1a, then load it back to Designer and adding/substraction will work without a hunt for abandoned nodes. Not a perfect solution, but a time saver for sure.

Thanks for the help! That's actually how I did it at first. Problem is that the shape got rasterized upon export. I need a vector shape because that pink layer with the text cut out is meant to become part of a UV spot layer, which doesn't work with a rasterized bitmap.
 
I attached the file with both English and German text converted to shapes. Thanks for taking the time to look into it!
 
klsmn
subtract.afdesign

Thanks for the help! That's actually how I did it at first. Problem is that the shape got rasterized upon export. I need a vector shape because that pink layer with the text cut out is meant to become part of a UV spot layer, which doesn't work with a rasterized bitmap.
 
I attached the file with both English and German text converted to shapes. Thanks for taking the time to look into it!
 
klsmn
subtract.afdesign

Hi klsmn,
You will need to increase your 'mitre' (gehrung) value as you increase the stroke width to overcome this. I'm not sure if there is a specific correlation between stroke width and required mitre setting but it would be helpful to know from the dev team as it would allow us to set accordingly to avoid these issues rather than experimenting through trial and error.
Can anyone confirm if there is a specific correlation between the two, i.e. a factor figure so if you have a stroke of 'x' you then need to multiply by 'y' to give you the required mitre value to avoid the OPs issue?

Is there a way to export a multi-page document (such as a booklet) as a single-page PDF? Printers/Prepress often require single-page PDF