I joined BW family one month back and knowing basic concepts of BW. When i try to execute query i get the error message "abort could not determine value for 0dat variable from authorizations . message no BRAIN 656". For resolving this we activate 0calday in Business Content. But i faced this problem 2-3 times and all the times had to activate 0calday object. What is the reason for happening like this? I searched in forum but no use. Can any one tell me the reason for this.