
You have made the settings in the sender system.
If you want to specify segment release in the adapter and have already loaded metadata, delete all metadata for the sender port and loads the metadata again.
More information: Loading, Displaying, and Deleting Metadata
If you want to use IDoc packaging, activate the syntax check in the Integration Engine configuration (parameter SYNTAX_CHECK).
You configure the sender IDoc Adapter to be able to process IDoc packages that come into the inbound channel of the Integration Server further using the Integration Engine. You can specify segement release so that IDocs are forwarded correctly.