Error in searching in DataGridView

Hello, I have a Textbox where I insert a name automatically searches the DataGridView with data from the employees, for example if I type the letter "a" it will appear all the names beginning with the letter "a" but if the DataGridView has no name with the letter "a", the system error.

I would like to know if you have a code that does not give an error, that when you can not find a name with the corresponding letter, do not close the program

The code I use in the textbox to do the search is this:

FuncionariosBindingSource.Filter = "nome like'%" & TextBox1.Text & "%'"

Thank you in advance!