You created a Do loop construct, but did not properly terminate the loop. Do loop constructs are terminated with an associated Loop statement. The following demonstrates the correct structure of a Do loop construct.
Do [{While | Until} condition] [statements] [Exit Do] [statements] Loop
Or, you can use this syntax:
Do [statements] [Exit Do] [statements] Loop [{While | Until} condition]
To correct this error
Make sure that the Do loop construct includes all the necessary parts.
Do...Loop Statement | Exit Statement | For...Next Statement | While...Wend Statement