Do not use any special characters

What causes this issue?

The use of special characters can cause problems under Unicode,
particularly when converting to a Unicode-enabled system, since these
special characters are not avaialble in all code pages.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.