Question: Example:

> 
> The accident happened due to a lack of communication (or coordination) between the parties involved.
> 
> 
>

Answer: 
**Miscommunication** — [Cambridge](http://dictionary.cambridge.org/dictionary/english/miscommunication)

> 
> *noun* Failure to communicate ideas or intentions successfully
> 
> 
> *"A spokeswomen blamed the confusion on miscommunication between the company and its customers.*"
> 
> 
>
Perhaps **disconnect** ([Cambridge](http://dictionary.cambridge.org/dictionary/english/miscommunication))

> 
> A situation in which two or more things are not connected in the way
>  that they should be.
> 
> 
> 

better indicates the missed opportunity to communicate, if that's your intention.

**[Breakdown](http://dictionary.cambridge.org/dictionary/english/breakdown)** also sometimes gets used in this sense, though the assumption that it refers to communication (rather than, for instance, their automobile) may be a little more ambiguous in certain situations or audiences.