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排期到了之后交上的，主申请人已收到485, 765, 131 的receipt notice，附申请人被reject 退件。原因不知道是什么意思，The principal application could not be accepted for the reason(s) specified on the related Notice of Action (Form I-797) Therefore the processing of all riding applications cannot continue."

这是不是移民局的错误，
-Did you put the 附申请人 application together with the 主申请人 application in the same packet ? If yes, it seems the rejection was a mistake.

是不是再递一往遍，加上主申请人的approval notice?
-Yes, just file it again (you can just send the original documents back to USCIS. Provide the copy of the I-485 receipt notice of the 主申请人.