On Windows, signal() can only be called with SIGABRT, SIGFPE, SIGILL, SIGINT, SIGSEGV, or SIGTERM. A ValueError will be raised in any other case. ``` C:\Repos\UnityRF\ml-agents\python\unityagents\environment.py in __init__(self, file_name, worker_id, base_port) 86 str(file_name))) 87 ---> 88 old_handler = signal.signal(signal.SIGALRM, timeout_handler) 89 signal.alarm(30) # trigger alarm in x seconds 90 try: AttributeError: module 'signal' has no attribute 'SIGALRM' ```