SDF simulations are passing but noSDF is failing (SimVision).

[Ramo.]

I'm running simulations but i noticed that noSDF simulations are failing, although simulations with SDF are passing.

For an instance I know that SDF simulations are the closest to silicone, so we can neglect the noSDF that are having mismatches. But i want to go to the bottom of this issue to remove this problem in my case.

I think that it must be the simulator (I'm using Cadence SimVision), it has some problems scheduling 2 events happening at the same time.

Do you have any idea why this might happen?

Cadence is quit new to me ( I used modelsim before), in modelsim the solution was to add nospecify option.

Do you know if there is a similar option in SimVision?

 

[song524]

If the design is all synchronous. It should not happen.
There must some delay related design blocks, which does not have a proper simulation delay in RTL.