I am trying to generate report in MS word.The functions used in report generation are appending test and appending table.At few instance of report generation getting the attachded warning/error And report is not generated.
To see where/if there is an error/misunderstanding in your code, we need to see your code. Showing us the error message is not helpful (except to say "Oh, there is an error in your code", but you already knew that ...).
Incidentally, do NOT paste a JPEG of your block diagram to show us the code. Either attach the VI or paste a Snippet (if you don't know about Snippets, look up "VI Snippets" in the LabVIEW Help).
The code looks "busy" (I'd recommend "hiding the details" inside sub-VIs) but otherwise OK. A web search for the Error showed some instances where Norton Antivirus was a culprit, and where a bad Normal.dot template caused the error. However, I would expect that these would always cause errors.
You know your environment better -- take a look on the Web by searching with the numeric (try both Hex and decimal) values.
