Hi,

You may share voucher details screenshot and automatic posting rule screenshot to compare rule  trigger conditions with voucher content.
In general, in automatic posting rule you are defining voucher type, voucher date scope (rule validity) and row selection criteria (code parts).

It was something like attached to distribute cost from cost centre A to B 

Hi,
In automatic posting rule definition, please use % if you want rule to trigger for any value of code part in voucher row. I think empty value of code part means to trigger it only for empty value in voucher row. 
empty value of Code G in your example might be the reason

Hi, 

Adam is 100% correct. The first page of the rule is the trigger of when the rule takes effect. 

The affected voucher must be an exact match to your rule. 

In the above - it appears that the CODE G value is set as null meaning the rule is triggered when code G is null / no value.   However, your voucher entry actually has a code G value. Therefore, it’s not an exact match - the rule is not triggered.  

If the above screen uses a % or similar for the code G, then the rule would be triggered when the voucher has code G with a value such as GBP. 

Best regards 

i will make a change later and see what’s the result.

@Adam Bereda @Thomas Peterson Thank you so much for the guide,