Memory error in Fmod

Does anyone know what the following error is alluding to between Fmod + Unity?

SystemNotInitializedException: FMOD Studio initialization failed : FMOD.Studio.System.create : ERR_MEMORY : Not enough memory or resources.
FMODUnity.RuntimeManager.CheckInitResult (RESULT result, System.String cause) (at Assets/Plugins/FMOD/RuntimeManager.cs:156)
FMODUnity.RuntimeManager.Initialize () (at Assets/Plugins/FMOD/RuntimeManager.cs:210)
FMODUnity.RuntimeManager.get_Instance () (at Assets/Plugins/FMOD/RuntimeManager.cs:82)

The error causes all Fmod playback to stop. Is there an artificial limit to the amount of sounds that can load into the game defined by fmod in the settings somewhere or from Unity?

I believe this would be caused by reaching the limit of FMOD Studio Systems created, which is 8 separate systems. If you aren’t creating multiple systems then there could be a bug which is stopping the systems from being destroyed.

Can you tell me more about the error:
When does it seem to occur?
What version of the FMOD Integration are you using?