Trigger Issue updating User Defined Dimension

[Josh Kenzer]

I'm trying to update a User Defined Dimension on the AP Bill Detail based on the value of the account number used.

Trigger: Before Create, Before Update
On field Change: Any update
Record: AP bill detail
Field to change: Restriction

Change Formula:

let [accountNum,nothing] = "{!APBILLITEM.ACCOUNTNO!}".split("-");
if(accountNum >= 50000){
  return 10002;
}

I've verified it's running, and the formula works as it will successfully update the Memo field. However, when I try to update the dimension, it doesn't update. I tried the update via Postman using 10002 for the value of the User Defined Dimension, and it updates correctly.

Is this a limitation of triggers?

[Josh Kenzer]

Any other method I've come up with to achieve this will cause a recursive loop. Any ideas on how to achieve this? @Louis Sterio2

[Sterio, Louis]

Is this attempting to execute an API call in a document template? Can you provide the API call that is attempting to run?

[Josh Kenzer]

I tried to do that, but I think I started a recursive loop. The API called caused the trigger to fire and since the trigger is on the APBILLITEM which is what the API is updating, it caused the API to trigger again. Here the API call:

<update>
        <APBILL>
          <RECORDNO>{!APBILLITEM.RECORDKEY!}</RECORDNO>
          <APBILLITEMS>
            <APBILLITEM>
                <RECORDNO>{!APBILLITEM.RECORDNO!}</RECORDNO>
                <AMOUNT>{!APBILLITEM.TRX_AMOUNT#value!}</AMOUNT>
                <ACCOUNTNO>{!APBILLITEM.ACCOUNTNO!}</ACCOUNTNO>
                <LOCATIONID>{!APBILLITEM.LOCATIONID!}</LOCATIONID>
                <VENDORID>{!APBILLITEM.VENDORID!}</VENDORID>
                <PROJECTID>{!APBILLITEM.PROJECTID!}</PROJECTID>
                <GLDIMRestriction>10002</GLDIMRestriction>
            </APBILLITEM>
          </APBILLITEMS>
        </APBILL>
</update>

What I'm attempting now is a "Update Field Value" trigger. Here is a screenshot: 

Edited August 28 by Josh Kenzer