SAP Message S>211 - Do not use non-7-bit ASCII characters (see long text)

Diagnosis
An error occurred when the HTML text was converted. The source codeprobably contains non-7-bit ASCII characters. These characters can causeproblems in the customer system (in combination with the system codepage).
The error occurred when the the following template was edited: &V1& &V2&V3.

Procedure
Only use 7-bit ASCII characters, even in comments.