# Limitations

When working with ARC data sources, the following limitations apply:

* IBM DB2 on iSeries (ARC): Table and field names that contain the "/" character are not supported.

* Only one Replicate task can work with the same ARC Agent concurrently.

* Replication of DDL changes to the target endpoint is not supported.

* Replication of data with 4-byte emoji characters is not supported with IBM IMS.