I'm trying to write a custom function which will run whenever a 'Contact' is updated - it should update all items within a related list (called ProductContacts which is CustomModule1).  How do I retrieve the ID value to pass into updateRecord?  I've tried CustomModule1_ID and ID but the idStr parameter is always returning as null

I've tried GetRelatedRecords and SearchRecords but to no avail.

Could you provide some assistance to allow me to loop through all my customModule record, update one field and save the changes?

Thanks,

Beth