BUG-000151657 for ArcGIS Field Maps

Bug ID Number	BUG-000151657
Submitted	August 18, 2022
Last Modified	September 26, 2025
Applies to	ArcGIS Field Maps
Version found	22.2
Operating System	N/A
Operating System Version	N/A
Status	Will Not Be Addressed

Additional Information

The expression is not correct. Each time the expression evaluates, a new GUID is returned, leading to an infinite loop. Define a GUID initially and check if the field value contains a GUID. If it is empty, create and assign a GUID using the Guid() function. If not empty, return the current GUID field value. For example, to calculate a random GUID in a field, use the following expression and replace FIELDNAME with the name of the field: var id = $feature.FIELDNAME IIf(id==null, guid(), id)

Workaround

Define a GUID initially and check if the field value contains a GUID. If it is empty, create and assign a GUID using the Guid() function. If not empty, return the current GUID field value.

For example, to calculate a random GUID in a field, use the following expression and replace FIELDNAME with the name of the field:

var id = $feature.FIELDNAME

IIf(id==null, guid(), id)