AR# 3157: PAR: Error: baspw: 134 Input design is empty.
AR# 3157
PAR: Error: baspw: 134 Input design is empty.
Description
While running the implementation flow you get the following error just after PAR runs.
Error: baspw: 134 Input design is empty.
解决方案
In some cases map will trim all the logic out of the design creating an empty .ncd file. There is one very common and simple cause for this problem. This is due to some logic not being connected in the schematic via IBUF's, OBUF's, IPAD's, and OPAD's. Map will even trim out logic that has a input connection but no output connection. So in this case check the schematic and/or map reports to see what is getting trimed out by map.