ora-1274
I have created two new datafiles on a primary side of standby DB (10.2.0.3). I have confirmed that there is enough room on the standby side to accommodate these files ; I have also confirmed that the db_convert parameter is set properly. I don't know what else was there to check and yet, I got ora-1274 error - not being able to create a new file. I had to create it manually ; then I had to do the same for the second file. After that everything went back to normal (I tested it by resizing my new datafiles down and seeing their size being reduced on the standby