This typically occurs when you've read in a LEF already that has MACRO dp_rf_256x8 defined. The cell can only be defined in multiple LEFs if one LEF contains the logical/physical info and the other LEF contains the process antenna info. When reading in the LEF files you must specify the antenna LEF file after the LEF containing the logical/physical info. Here is the order the LEFs should be listed so they are read in the proper order:
1. Technology LEF
2. LEF containing logical and physical information for the cells
3. LEF containing process antenna rules and information.
Hope this helps,
In reply to wally1:
Dear Brian(wally1) , thank you!!
It's really work, I switch the order of those lef file like you said, and I can do the special route now, the msg has gone, yes!
You just save my weekend. ^_^ ~~ yes!!