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attempt to generate initial guess for dc solver failed

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maninnet

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dc solver

1. i run transient simulation for an opamp, the first line of the simulation is:

"attempt to generate initial guess for dc solver failed", even though the simulation could go through, but there must be something wrong, how to fix it or find out the cause?


2 Another seperate question:

sometimes the simulator will gives waring such as "net12 not connected" or something like that, even thouge the net name is displayed on the schematic,
but if there are too many components, it is difficult to find a net name of interest, such as the hypothetical waring, in which i need to find net12, how to locate it quickly?
 

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