Hi toutiao,
I know you're presently work with us on this issue through your SSP, but I wanted to throw in my own suggestions on troubleshooting this problem. You can view the subVIs of the Database VIs, such as DB Tools Execute Query and DB Tools Fetch Data. I know you said there's no error returning, but can you determine where the program appears to cause problems? That is, in highlight execution, can you trace through the subVIs where the problem begins?
If we can determine where the DB VIs are having problems we can troubleshoot the primitives at our end.
Cheers.
| Michael K | Project Manager | LabVIEW R&D | National Instruments |