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High Fanout nets synthesis encounter

kenambo

Hi All

              I got the high fan out nets using dbGet command into a list. Then I used bufferTreeSynthesis command and got an error.

The error says...  the net a/b/c/d/n_1 has no driver .. and the buffer tree synthesis aborted.


Actually the net it shows is the  input of a macro which i have included in the design.


So what I have to do to get successful buffer tree synthesis. I am struck here.

Added to the above, while i m doing buffer tree synthesis for another design I got two nets that are VDD and VSS also has no driver and the synthesis aborts.

How to Declare these nets as Ideal nets and avoid being called as High fanout nets,.. any suggestions please?

thanks,

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