Restrictions in SAP S/4 HANA 1809

In SAP S/4HANA the maximum length of the material number has been extended to 40 characters.
In SAP S/4HANA 1809 currency amount fields with a field length between 9-22 including 2 decimals have been extended to 23 digits including 2 decimals.
The extensibility framework is currently not integrated in the privacy by default functionality of S/4HANA. Do not use this functionality for the processing of personal data if data protection legislation is applicable.
The SAP S/4HANA 1809 skills provided for SAP CoPilot have functional issues when used with SAP CoPilot 1808. SAP plans to resolve these with SAP S/4HANA 1809 Feature Pack Stack 1 so that they work with SAP CoPilot 1811.
The below Business Functions are not released with SAP S/4HANA 1809.

It is not permitted to switch them on, even if it is technically possible.
If a Business Function was switched on in the start release system, but defined as always off in SAP S/4HANA, then a system conversion is not yet possible with this release at that current point in time.
If a Business Function was switched off in the start release system, but defined as always on in the target release, then the business function will be automatically activated during the conversion.

The following add-ons cannot be converted to SAP S/4HANA 1809 in one step but require an intermediate upgrade step:

Upgrades and conversions of start systems based on 'IBM i' are currently not supported.
In SAP S/4HANA on-premise, Event-Based Revenue Recognition is not available for Sell from Stock scenarios.
The Fiori app "Revenue Recognition (Event-Based) - Sales Orders" (F2441) is only available for cloud customers. It cannot be used, and there is no support in on-premise installations.
Only Project Based Services are supported with Event-Based Revenue Recognition
SAP S/4HANA 1809 supports the following industries:

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