Do you have a small code sample demonstrating your issue. I assume you refer to the task parallelism in System.Threading.Tasks, but this it not certain.
Opening up graphic windows from R.NET used to be an issue at least on Windows. I am not familiar as to why. Unless something has changed. Also, the R native engine is not thread safe if any concurrency is involved, so using task parallelism is not recommended.
Opening up graphic windows from R.NET used to be an issue at least on Windows. I am not familiar as to why. Unless something has changed. Also, the R native engine is not thread safe if any concurrency is involved, so using task parallelism is not recommended.