Need to exit loop early

Hopefully this is a straight forward question.

I have a script that reads a file one line at a time, and carries out
ceratin actions depending on what it reads on each line. The script uses a
Do Until....Loop, using

Do Until objTextFile.AtEndOfStream

Loop

I need to add error checking, so that if a set action to be carried out by
the script has an err.number <> 0, the loop will ignore the rest of the loop,
and continue to the next line of the text file that it is reading. So, what
I need to the command to end one "loop" early, but continue through remaining
loops. I'm sure it should be really simple, but I don't seem to be able to
get the syntax right.
.