导原理出错，请大家看看

Error: Line 4521 in file f:\gjg\allegro/pstxnet.dat:
Reference designators inconsistent in xprt and xnet files
Detected in function: pstFindInstByOldPathName
Error: Line 4521 in file f:\gjg\allegro/pstxnet.dat:
Error loading the net list file
Detected in function: ddbLoadPstXFiles
#13 Error [ALG0036] Unable to read logical netlist data.
不知道是什么错误，太大了啊
望各位帮助