Pull part of data from a string

[lindag]

I have a field that could contain various different characters before
and after ###-###-####.

I want to extract ###-###-#### from the fields but I keep getting
errors.

Any thoughts or suggestions would be greatly appreciated.

 

[SoftwareMatters]

What are the errors?
What does your code look like?
Can you give some examples of wjhat you are tryin g to achieve i.e. with starting string and the string you want to end up with?
Thanks