Jess,
It's available from IC5141 onwards. You use it by putting
Code:(* instrument_module *) module myModuleName...
What it does is disable the checks for hidden states - which is fine for a baseband signal source in envelope analysis, and for measurement blocks in envelope analysis - but not if the model is (say) a sample and hold, or divider in a PSS analysis.
In other words, you don't want to disable the check for cases where the hidden state will affect the results. In a signal generator for envelope this wouldn't affect the results.
Similarly it is possible to mark particular variables as not being state variables by using the (*ignore_state*) attribute. For example:
Code:(*ignore_state*) real myVar;
This might be useful if the variable is just used for (say) informational messages, but does not affect the true circuit state.
Regards,
Andrew.