So he said the lawyer said they may be referring to his wife's immigrant visa petition (he filed I130 for his wife from outside the US. Her case was approved after a lot of investigation by the embassy. According to him, his wife was interviewed by the fraud department of the embassy before her visa was finally issued. Based on this history, his lawyer is suspecting the file they are referring to is his wife's A-file. Also, he said the lawyer mentioned that she'll confirm if they have all his files before he comes for the next scheduled interview because this is the second time they are rescheduling his interview. He's just wondering if anyone has had issues like this.