Can't see good variables in Query Designer BW 7.0

Hello,

The technical name of our caracteristic variables in the Query Designer are prefixed by "OR_" or "SV_". I try to make a filter in this variables (for example: a user must be able to see only "SV_" variable) with the authorization objects S_RS_COMP and S_RS_COMP1. But this filter does not work, even if the ST01 trace shows me a Return Code = 4 for the test in the variable technical name.

Have I made something wrong ? is it a bug ? (we are in BW 7.0 SPS9 with Sapgui 6.40 SP 19 and BEx SP 12).

Thank you for your help