Data Store Entity Error

Question

Hi,
I try to make process model in Appian, at this moment i resolve all errors when i try to validate in process designer created model.
This is what i do:
from tempo i click to go into runtime data and start process "action completed successfully" then switch to tempo because i see new task (at this moment i assigned task to myself).
When i click in task i go to next, and next...the process will stop when it comes to object called data store entity in my process model.

The intention for my work in Appian is to create process model with objects that are really exists in company, after that to know about time of certain process nodes etc.

"An Error Has Occurred
java.lang.IllegalArgumentException: The id of the data store entity must be a composite id with a "@" as separator:"

Do you have some advice what i do wrong?

jonathan.guillen · Answer

Hello, 
 Did you create the mapping of the CDT and Database in a proper way? 
 Please download your CDT, and verify that you have on your specified Id, @Id and if it's required @GeneratedValue. 
 You are able to see further information at the following link: 
 
 https://docs.appian.com/suite/help/18.1/Supported_XSD_Elements_and_JPA_Annotations.html 
 
 Another approach that you can use without worrying about JPA annotations is creating a CDT from the database table or view. 
 new > datatype > create from the database or view. 
 
 On this approach, Appian will create the mapping automatically. 
 Verify that your physical table within the database has a primary key.

Moreover, within your process models, you can use activity chaining. 
 please verify the following information: 
 
 https://docs.appian.com/suite/help/18.1/Configuring_Activity-Chaining.html 
 
 Regards.