SAP ABAP Message Class 37 Message Number 556 (Delete the name & of the OK_CODE field first)
Hierarchy
SAP_BASIS (Software Component) SAP Basis Component
   BC-DWB-TOO-SCR (Application Component) Screen Painter
     SCRP (Package) Screen Painter
Attribute
Message class 37  
Short Description Screen Painter    
Message Number 556  
Documentation status       Space: object requires documentation
Authorization check Error Message      
Changed On 20090618   
Message Text
Delete the name & of the OK_CODE field first
Help Document

Diagnosis

You tried to convert the screen to an include screen (subscreen). However, the OK_CODE element of the screen already has a name.
The OK_CODE field is not available in a subscreen. Instead, function codes are passed back to the OK_CODE field of the main screen. If you used the name of the OK_CODE field in the modules of the subscreen, it would refer to an undefined value.

System Response

The system cannot convert the screen into a subscreen.

Procedure

In the element list, delete the name of the OK_CODE field (by overwriting it with spaces). Check as well whether you have used this name in the screen modules to evaluate the OK_CODE, and change the program logic accordingly. You can then return to the screen attributes screen and repeat the operation.

History
Last changed on/by 20140121  SAP 
SAP Release Created in