[请教]CIS生成网表时这个错误怎么解决？

完成原理图后，生成网表时提示是这样的，除去warning，error如下

ERROR(SPCODD-47): File C:/DOCUMENTS AND SETTINGS/SN6002/桌面/ALLEGRO/pstchip.dat could not be loaded, and the packaging operation did not complete. Check the pxl.log file for the errors causing this situation and package the design again.

#53 ERROR(SPCODD-53): Packaging cannot be completed because packaging has encountered a null object ID. The design may not have been saved correctly. Save the schematic and rerun packaging.

#12 Error [ALG0036] Unable to read logical netlist data.

对于第一个error，路经改成不含中文字符的路经，还是有相同的错误。第二个错误中‘packaging has encountered a null object ID’是什么含意？这个问题怎么解决阿，请大家指点一下。