Unterminated string constant

You omitted the double quotation mark that signals the end of a quoted literal on a single line. Double quotation marks must be paired on the same line. For example:

Print "Hi,         ' Illegal because end quotation mark is missing.
Martin."
Print "Hi, "  _    ' Legal because string is properly quoted
"Martin."          ' Legal because string is properly quoted and
                   ' preceded by line-continuation character
' Output: Hi, Martin.

Terminate the string with double quotation marks on the same line where it starts.