ModelSim : signals not passing between entities

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Without seeing the code - its very difficult to see whats going on.

Also - post the testbench you are using.

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Thanks for the reply.

I didn't realise I needed to use a testbench for this. Reading up beforehand on simulating with ModelSim, every article I read just used the design units used in the project for the simulation. I don't think any of them even mentioned a testbench.

I've never written a testbench before, so I'll read up how to do it.

Regards