ORCAD产生网表时错误

生成网表时提示:
ERROR [NET0021]   Cannot get part.
[FMT0024] Ref-des not found. Possible Logical/Physical annotation conflict.
[FMT0018] Errors processing intermediate file
找了帮助文件:
[NET0021] Cannot get part
The netlister was unable to get a part instance while creating is packing table. This error can occur when the design file is corrupt.
[FMT0024] Ref-des not found. Possible Logical/Physical annotation conflict. [FMT0018] Errors processing intermediate file
This error message indicates that there are illegal characters, such as dashes, in a reference designator prefix. To remove this error choose Browse, Parts from the Edit menu after highlighting the design name in the project manager. Scan the list of reference designators for possible illegal characters. Double-click on the reference designator that contains such a character; this highlights the related part in your design window. Double-click on the highlighted part and remove the dash from the reference designator prefix in the Edit Part.
不知道有没有筒子遇到过..

解决了:有一个电容没有REF值,位号重编时不能产生位号,把这个电容删掉,COPY一个就OK了.
给各位一个提醒也好..