SAP Message RSDS171 - Character field &1, value '&2' contains illegal characters

Diagnosis
While defining the DataSource, you specified that lower case letters
are not permitted as values of field &V1&.
If you have not set this indicator in the DataSource maintenance,the characteristic value is checked for consistency.
Special characters are also not permitted. This is because specia
l characters in the country-specific character sets can be stored indifferent positions in the ASCII table. This could lead to them beingdisplayed incorrectly after they have been transferred from the sourcesystem.

System Response
The value &V2& was declined.

Procedure
In the maintenance of permitted characters in BI (
Maintain Permitted Additional Characters), you can declare specialcharacters as valid.
See also: Permitted Characters.