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.