RuntimeError: main thread is not in main loop

[wkgit88]

When I was training in BDD100k , error occurred. I changed the num_workers from 8 to 1 but this still happened:

xception ignored in: <function Image.del at 0x000001E7CCBA4040>
Traceback (most recent call last):
File "C:\anaconda\envs\multi\lib\tkinter_init_.py", line 4017, in del
self.tk.call('image', 'delete', self.name)
RuntimeError: main thread is not in main loop
xception ignored in: <function Variable.del at 0x000001E7CBD56700>
Traceback (most recent call last):
File "C:\anaconda\envs\multi\lib\tkinter_init_.py", line 363, in del
if self._tk.getboolean(self._tk.call("info", "exists", self.name)):
RuntimeError: main thread is not in main loop
Exception ignored in: <function Variable.del at 0x000001E7CBD56700>
Traceback (most recent call last):
File "C:\anaconda\envs\multi\lib\tkinter_init.py", line 363, in del
if self._tk.getboolean(self._tk.call("info", "exists", self.name)):
RuntimeError: main thread is not in main loop
Exception ignored in: <function Variable.del at 0x000001E7CBD56700>
Traceback (most recent call last):
File "C:\anaconda\envs\multi\lib\tkinter_init.py", line 363, in del
if self._tk.getboolean(self._tk.call("info", "exists", self.name)):
RuntimeError: main thread is not in main loop
Exception ignored in: <function Variable.del at 0x000001E7CBD56700>
Traceback (most recent call last):
File "C:\anaconda\envs\multi\lib\tkinter_init.py", line 363, in del
if self._tk.getboolean(self._tk.call("info", "exists", self._name)):
RuntimeError: main thread is not in main loop
Tcl_AsyncDelete: async handler deleted by the wrong thread

Anyone can help me? Thanks a lot

[AntonioConsiglio]

Try to set num_worker to 0. Then let us know if you have same error.