This is clearly a bug in web2py's messagebox handler as it could be trying
to create a new TK mainloop while the previous one is not yet destroyed. TK
only allows one mainloop.
Try something for me and see if it works.
add this to the beginning of gluon/messageboxhandler.py
import threading
mblock = threading.Lock()
then in the emit function put everything there inside a with mblock:
def emit(self, record):
with mblock:
if tkinter:
(...)
This is still not the ideal fix as it will lock the threads waiting for you
to close the message box if they try to log something. Ideally someone
would make a "logger thread" that would be running TK mainloop then emit
would simply queue the log messages to this "logger thread" that would
display messageboxes until the queue was empty and then wait for more.
--
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