Trigger message box after user updates VBA form based on data calculated in a cell

Hi all,

This is my first post and I hope it is clear and I thank you in advance for your help. I have created a simple translation cost and delivery calculator in VBA (which sends data to a worksheet for calculations) so users can enter the number of words they need to translate and their preferred delivery date. Once they enter this data and click Update, the form retrieves the translation costs from a cell, retrieves the rush (due to larger volumes in shorter delivery time) from a cell, and combines both to display total cost.

As many times the users will ask for impossible delivery times, my worksheet contains formulas that calculate the number of words possible in the rush cell and either returns the percentage extra they will pay or says "Not Possible" if it is not. My problem is, I do not know how to write a Sub that, after update, checks the rush cell in my worksheet and displays a Msgbox if the returned value is "Not Possible" BEFORE giving me a type mismatch error as the rush percentage is not numeric.

I hope this makes sense but happy to clarify and thank you again for any help. I've included my code as this may be helpful:

Please Login or Register  to view this content.

Attaching a sample workbook enables others to work on your problem:

To attach a sample workbook. Make sure there is just enough data to make it clear what is needed. Include BEFORE/AFTER sheets if needed to show the process you're trying to complete or automate. Remember to desensitize the data.

Click on GO ADVANCED and use the paperclip icon to open the upload window.

View Pic