I need to implement a conditional warning message before submit

I need to show a warning text if a field is not entered. I can use conditionals to work a solution, but the field I check is a numerically masked 10 digit number. If the user does not enter all 10 digits, I need to display the warning text. Conditional logic does not fully work, that is, if the field is totally empty, the warning text shows, but as soon as user types in 1 digit, the warning goes away. Is there way to check length of the field in the condition? Or another way to check this? 

A assume that your question is related to your Texas Teacher Academy Stipend Form and to Unique ID field.

To resolve your issue you simply need to disable or delete your Hide condition for text field. 

Here is my demo form: https://form.jotformpro.com/70875546514968 

Feel free to test it. 

Hope this will help. Let us know if you need further assistance.

Actually, that worked! Thanks.