.exe created with pyinstaller fails to execute

[iankerr]

Thanks for the response. The pyinstaller command was in the original message. it is
.\pyinstaller --onefile --windowed tables.py
Sorry about the code - here it is included properly. This runs with no issues under python.

import random
print ("test your tables")
choice = input("Want to choose a table? y/n: " )
if choice == "y":
    tablechoice = int ( input ("Which One? 1 to 12:"))     
trials = 1
while trials < 100:
    trials = trials + 1
    if choice != "y":
        a = random.randint(1, 12)
    else:
        a = tablechoice     
    b = random.randint(1,12)
    print( "what is", a, "times", b, "?")
    answer = int (input()) 
    while 1==1:
        if answer == a * b:
            print ("well done")
            break
        else:
            print ("try again")
            print( "what is", a, "times", b, "?")
            answer = int (input())