If you just plot the first four characters, it works:
LEFT([Del Postcode], 4)
As a workaround, you could consider trying to find a spatial file for this.
Find my approach as reference below and stored in attached workbook version 10.5 located in your original post here:
My approach is based on on the following thread
Most important step is splitting the dutch postcode;)
1 of 1 people found this helpful
Dear NORBERT MAIJOOR,
I hope you can help me.
When I use your workbook above, I get the following error with postcodes.
I have had this problem for a long time and also with my own datasets. Do you have a solution for this?
PS: I use version 2020.1
Thanks in advance,