Geoffrey_Coram
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EM is a BSIM3/BSIM4 parameter, and its default is 4.1e7, but the Berkeley code doesn't have any restrictions on its value -- if it's negative, the code skips a block in the 1/f noise evaluation.
If you're not doing noise analysis, I'd ignore it. If you are, I'd contact the vendor and ask why you're getting that message.
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