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runtime error :- Fatal: (F4) assertion failed: iface != 0


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Hi All,

I am new to the SystemC language.

I am working on some SystemC project. Although all modules are compiled without any warning, there is a runtime error as follow. Can anyone help me to find out the reason for below error?

Fatal: (F4) assertion failed: iface != 0
In file: /usr/local/systemc-2.3.3/include/sysc/communication/sc_port.h:553



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This means that a port is not bound to an interface. A port is just a kind of a forwarder of an interface. So if none is bound nothing can be forwarded. E.g. if you have a sc_in<bool> it forwards the sc_signal_in_if which allows you to read and wait for events. But there needs to be 'something on the other side' which is usually a signal (implementing the sc_signal_in_if) being bound to the socker.

But without further information it is hard to provide more help.

Best regards

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The issue is likely caused  because you access a port (via -> or for example calling functions like .read()) already inside the module constructor.
You should only access ports after binding has completed, this means from within a SystemC process or in end_of_elaboration()start_of_simulation() callbacks.

Hope that helps,

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