In the spectre manual that I referenced earlier:
imax are used on devices containing
p-n junctions. These devices include .... diodes....
imax is a warning control parameter. Normally,
does not affect the simulation results. Whenever the junction current
is larger than
imax, the Spectre circuit simulator issues a
warning. The default value of
the default value of
imax can affect the simulation results only when
imelt is not specified and takes its value from
High-level injection knee
current for sidewall.
Reverse high-level injection
knee current ( hspice compatibility
flag only ).
I cannot comment on Agilent's model, as I do not support their simulator. You may want to put in a call to Cadence Customer Support (support.cadence.com) if you cannot find the information that you require in the Cadence Spectre Modeling Guide manual.
Staff Support AE, Global Customer Support
Cadence Design Systems, Inc.