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*E,OBJACC: Object must have write access: <object name>

prkroon

I am new to the forum so I do not know if the subject I post in this forum is the correct place.

Anyway, During simulation in ncsim I want to force an internal digital signal in the mixed signal design to a certain binairy value.

The signal in question is generated in vhdl and in my opinion a normal digital signal output.

However when I force it during simulation I get the following message:

*E,OBJACC: Object must have write access: <object name>

The <object name> is the signal/pin I force.

I searched in the online ncsim/simvision manuals and cadence site but sofar I could not find the cause of the error message.

So the question is why I can't force this digital signal, other signals in the design I can but some I can not giving me the discussed error message.

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  • TAM1

    As far as I know, there's nothing that tells you what the optimizer did or didn't do. It will always try to make the simulation run as fast as possible given the kinds of access you tell it you need. The only other kind of access I didn't mention that I commonly use is to add the option "-linedebug." This tells the simulator to keep track of what line of source code it is executing at any particular time and can be useful for single stepping thru the simulation. All of these options can slow the simulator down, so are turned off by default.

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  • TAM1

    As far as I know, there's nothing that tells you what the optimizer did or didn't do. It will always try to make the simulation run as fast as possible given the kinds of access you tell it you need. The only other kind of access I didn't mention that I commonly use is to add the option "-linedebug." This tells the simulator to keep track of what line of source code it is executing at any particular time and can be useful for single stepping thru the simulation. All of these options can slow the simulator down, so are turned off by default.

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