If  Story Drifts and Story Data are missing when trying to open .accdb file generated from Etabs into Rcdc .Then try the below steps : 

1) Check if the story drifts and story forces tables are blank , also check if the data in the story drifts and story forces tables is not exported correctly,

     You can cross check the data if present in the table or not by following the below path: 

     (In ETABS, go to Display > Show tables > Select story drifts and story forces tables > and see if there is story drift or story forces present in there)

2) Or else there is some connectivity issue between members in your model. Kindly perform the CHECK MODEL function for this issue --Refer below image for reference.