Hi @daniel-mislovic,

In the expression parser you provided there is a ")" missing at the end, as well as a number for the "idx" - <<REGEX('<input>','(?<=\d)(?=(\d{3})+(?!\d))','0')>>.

The rights syntax would be: <<REGEX('input', 'pattern', 'match-idx', 'group-idx')>>

Where:

• input - string to use REGEX on
• pattern - your regex pattern
• match-idx - zero based index of matched result to return
• group-idx - index of matched result group to return (0 = all groups, 1 = first group,...).
   

If match-idx and group-idx are empty, they are set to 0 as default.

Please note that single quotation mark is required.

Regarding the use case for adding the ' after every third number - currently only possible solution would be to write a regex that groups the number into group of 3 and saves each group into separate properties (PD.Group1, PD.Group2). You can then use CONCAT function (Auto Properties or Property Operations module) and merge those properties with separator '.

I have created a ticket for our DEV team for a new function for regex that would allow adding separators between groups easier (without new properties).