After careful consideration, we have made the decision to close new customer access to **AWS Mainframe Modernization self-managed experience**, effective June 30, 2026. Existing customers can continue to use the service as normal. AWS continues to invest in security and availability improvements for AWS Mainframe Modernization self-managed experience, but we do not plan to introduce new features. For more information, see [AWS Mainframe Modernization availability change](https://docs.aws.amazon.com/m2/latest/userguide/mainframe-modernization-availability-change.html). 

**AWS Mainframe Modernization Service (Managed Runtime Environment experience)** is no longer open to new customers. For capabilities similar to AWS Mainframe Modernization Service (Managed Runtime Environment experience) explore AWS Mainframe Modernization Service (Self-Managed Experience). Existing customers can continue to use the service as normal. For more information, see [AWS Mainframe Modernization availability change](https://docs.aws.amazon.com/m2/latest/userguide/mainframe-modernization-availability-change.html). 

# AWS Transform for mainframe Runtime Error Codes related to JICS
<a name="ba-runtime-error-codes-j"></a>

JICS error codes, prefixed with `BA-J`.


| Key | Severity | Text | Additional details | 
| --- | --- | --- | --- | 
| BA-J0001 | Fatal | Wrong configuration for JICS XA DataSource. Either correctly configure datasource.jicsDs.xa.data-source-class-name and other xa properties, or set spring.jta.enabled to false. |  |