SAP NetWeaver AS ABAP Release 751, ©Copyright 2017 SAP AG. All rights reserved.ABAP - Keyword Documentation → ABAP - Release-Specific Changes → Changes in Releases 7.5x → Changes in Release 7.50 →
Only Unicode Systems in Release 7.50
From Release 7.50, AS ABAP can only run as a Unicode system. Systems with non-Unicode code pages are no longer supported. Therefore, all runnable ABAP programs have the ABAP language version Standard ABAP (Unicode) or higher. Programs with the language version Obsolete ABAP (Non-Unicode) can no longer be executed. The syntax check can now only run using the rules from the Unicode check. The ABAP language version Obsolete ABAP (Non-Unicode) can no longer be used.