Browser.msgBox(prompt) gives a timeout error in Google SpreadSheet when the user does not press OK for a longer time.
I know I could use "toast()" , but with this option, the user will not be able to acknowledge the end of the execution and they might not know if the process has run or not.
What I would need is an option which does not timeout regardless the time until the user presses an OK button.
When using Browser.msgBox(prompt) the script will pause at this line until the Ok button is pressed the script is still running and the 6-minute timer ticking away.
If you are just using this to notify the user that the script has finished and not as some input to the script I suggest you use the HTML service as this will allow the script to end but remain on the screen until it is acknowledged by the user.
