Info object maintain directly in DSO without Master data .
DSO Activation failing due to invalid characters hence not able to generate SID's during activation .
Note : Special characters should be allowed .
I checked info object settings i.e " Lower case letters is not checked " .
At present no program available to handle these special characters.
No Master data maintainence is possible.
Now please please suggest how to handle these special characters in DSO's .
we are using 7.3 .