simulation errors by protel99

E

eehinjor

Guest
Hi,everybody.
I always do some simulations before designing PCB.But one quesiont
often occurs.
Such as in the same circuit,if the value of a resistor is changed,there
maybe a message:

COMFIRM
Errors occured during simulation,Do you want to view the errors now?

If I pressed the "YES" button,there will be some more messages below:
Note:Starting Gmin Stepping
Note:One Successful Gmin Step
Note:One Successful Gmin Step
Note:One Successful Gmin Step
Note:One Successful Gmin Step
Warning:Gmin Step failed.
Warning:Gmin Stepping failed.
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:Source stepping completed
Note:Starting Gmin stepping
Note:One successful Gmin step
Warning:Gmin Step failed.
Warning:Gmin Stepping failed.
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:Source stepping completed

Did someone encounter such problems?What reason??

Thanks all.
 
eehinjor wrote:
Hi,everybody.
I always do some simulations before designing PCB.But one quesiont
often occurs.
Such as in the same circuit,if the value of a resistor is
changed,there maybe a message:

COMFIRM
Errors occured during simulation,Do you want to view the errors now?

If I pressed the "YES" button,there will be some more messages below:
Note:Starting Gmin Stepping
Note:One Successful Gmin Step
Note:One Successful Gmin Step
Note:One Successful Gmin Step
Note:One Successful Gmin Step
Warning:Gmin Step failed.
Warning:Gmin Stepping failed.
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:Source stepping completed
Note:Starting Gmin stepping
Note:One successful Gmin step
Warning:Gmin Step failed.
Warning:Gmin Stepping failed.
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:One Successful source Step
Note:Source stepping completed

Did someone encounter such problems?What reason??
Click to expand...

The above are *status* messages. They simply tell you that spice was
having a litle bit of a dificulty in converging to the answer. Gmin
stepping and source stepping are just methods that are invoked to try
and get a circuit to converge to an answer. If it actually converges
then there is usually no error. If there is an actual error, the final
message will be of the type "simulation failed", with the result that
there will be no output data to view.

Kevin Aylward
informationEXTRACT@anasoft.co.uk
http://www.anasoft.co.uk
SuperSpice, a very affordable Mixed-Mode
Windows Simulator with Schematic Capture,
Waveform Display, FFT's and Filter Design.
 
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