I have a script that will be used by our production area to produce reports based on client data. This client data may comprise 1 month, or 1 year. Regardless, the data must be imported by the production staff. When the users chooses to add dat,. a Tk::DialogBox is shown. The user then, selects a file and enters a unique id number for the data. Once the user clicks OK the file is processed and added to the block of data from which the reports will be produced. This data may take 10 to 15 minutes .. at most 30 minutes to import. What can I do to keep the user informed that the process is indeed still "working as intended" and not DoA. I have read that Tk is not thread safe, I assume since it has its own command loop and what not. How can I keep a small window open that lets the user know what kind of progress is being made on the data importation?