pcb输出封装时出错

2dmin

现有一个板子，想把它所用的元件库输出，但是只有一部分输出了，另外一部分有如下错误，请问是怎么回事% o1 U6 l8 \1 g# s' o% S$ X
4 @9 J4 ^) s' H) u& f1 w1 b
ERROR: Symbol is missing a refdes.7 t8 q. S1 X' \! o
tsop48 being dumped.5 s4 b( O( R( i5 u+ b2 u
& {& M" `2 o4 @) U
sop14-d being dumped." {3 E% k9 v6 x" v. u9 e
2 G- w: H0 q$ l
sot-23c being dumped.

sx2-0508 being dumped.