Question

Registration parameters of a transaction are passed from BluePrism. How to retrieve them in Vantage and fill a field with the parameter's value?

Answer

If it is required to populate some field with the registration parameter value, and the same field exists in all Document Skills used in the Process Skill, then it will be more convenient to assign the value via Custom activity in the Process Skill.  

The sample script for the Custom activity is the following:

var doc = Context.Transaction.Documents[0];
doc.GetField("Custom Parameter").Value = Context.Transaction.RegistrationParameters["Parameter Name"].Value;

 The script for the Advanced Script Rule in the Document Skill is the following:

Context.GetField("Custom Parameter").Value = Context.Transaction.Parameters["Parameter Name"].Value;

Additional information

AU Help: Setting Up Advanced Script Rule

EU Help: Setting Up Advanced Script Rule

US Help: Setting Up Advanced Script Rule 

AU Help: Setting Up Custom Activity

EU Help: Setting Up Custom Activity 

US Help: Setting Up Custom Activity