Format and Parameters of the Error
Document 
The body of an error document for HTTP logon errors is usually in HTML or XML format. However, some tags have a special meaning.
<NO_TRANSLATION>...</NO_TRANSLATION>: The text between the tags consists of technical code that is not translated.
There are also the following tags with the format <%=...%>. These tags are replaced at runtime. You can use these tags to register an application-specific error text that is displayed when errors occur. The following information can then be added to the general error message to make the problem easier to identify and solve:
System-Specific Data
· <%=SYUNAME%>: User name
· <%=SYMANDT%>: Client
· <%=SYLANGU%>: Language
· <%=SYHOST%> : Server name
· <%=SYSYSID%>: System name
· <%=SYOPSYS%>: Operating system
· <%=SYDBSYS%>: Database type
· <%=SYSAPRL%>: System release
· <%=SYDATUM%>: Date
· <%=SYUZEIT%>: Time
· <%=SYDYNNR%>: Screen number
· <%=SYREPID%>: Report ID
· <%=SYECODE%>: ICF error code
· <%=SYXPROG%>: Name of ABAP program
· <%=SYTCODE%>: Transaction code
· <%=SYETEXT%>: Error text (system)
· <%=SYMSGID%>: System message ID
· <%=SYMSGTY%>: Message type
· <%=SYMSGNO%>: Message number
· <%=SYMSGV1%>: Placeholder for message #1
· <%=SYMSGV2%>: Placeholder for message #2
· <%=SYMSGV3%>: Placeholder for message #3
· <%=SYMSGV4%>: Placeholder for message #4
Request-Specific Data
· <%=PATHTRANS%> : ICF search path within URL
· <%=FORMFIELD%> : All form fields of document (in text format)
· <%=FORMFIELD_B64%>: All form fields of document (in Base64 format)
· <%=MESSAGE%> : Short text of error message
· <%=ABAPCALLSTACK%>: ABAP call stack
· <%=ERRORCODE%> : Name of ABAP runtime error
Example Program: Error Document
An SAP Web Application Server program shows you how you can use error documents. Procedure:
...
1. Call transaction SICF.
2. In the directory tree, choose the following path: default_host/sap/bc/error/template.
3. Double-click the templateservice.
4.
Choose Error Pages and then 
Change
Under Body , choose Display/Change, to display the
program code.
<html> <body> <H1><NO_TRANSLATION> 500 SAP Internal Server Error</NO_TRANSLATION></H1> <B>Error message:</B><%=MESSAGE%><BR /> <B>Additional information on the termination:</B> <BR /> <B>Type of termination:</B><%=SYETEXT%> <BR /> <B>System:</B><%=SYSYSID%> <BR /> <B>Server:</B><%=SYHOST%> <BR /> <B>Programm:</B><%=SYXPROG%> <BR /> <B>Path:</B><%=PATHTRANS%> <BR /> <B>Date:</B><%=SYDATUM%> <BR /> <B>Time:</B><%=SYUZEIT%> <BR /> <B>Message:</B></B><%=SYMSGTY%><%=SYMSGNO%>(<%=SYMSGID%>) <BR /> <B>Error Code:</B><%=ERRORCODE%> <BR /> </body> </html>
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