User`s guide

3
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28 Preparin
g
a Schematic for Simulation
Thin
g
s to Watch For
This section includes troubleshooting tips for some of the most
common reasons why your circuit might fail to netlist or
simulate.
Unmodeled Parts
If you see messages like this in the Message Viewer,
Warning: Part part_name has no simulation
model.
then you may have done one of the following things:
• Placed a part from the MicroSim libraries that is not
available for simulation (used only for board layout).
• Placed a custom part that has been incompletely defined for
simulation.
Do this if the part in question is from the
MicroSim libraries
• Replace the part with an equivalent part from one of the
libraries listed in the tables that follow.
• Make sure that you can simulate the part by checking the
following:
• That it has a TEMPLATE attribute and that its value is
non-blank.
• That it has a MODEL attribute and that its value is non-
blank.
For a roadmap to other
commonly encountered
problems and solutions, see
When Netlisting Fails or the
Simulation Does Not Start on
page 3-4.
The libraries listed in the tables
that follow all contain parts that
you can simulate. Some files
also contain parts that you can
only use for board layout. That’s
why you need to check the
TEMPLATE attribute if you are
unsure or still
g
ettin
g
warnin
g
s
when you try to simulate your
circuit.