Hello,
The subVI node setup could be the issue, or the VI's properties. It sounds as though you may have the "Show front panel when loaded" property set (which would cause the front panel to open when the subVI is loaded into memory, which is when the top level VI is loaded into memory - you can programmatically load VIs into memory by calling them by reference using VI Server, but that's a different issue altogether), but you can change that and many other properties for the VI as follows:
1. open the subVI
2. click File -> VI Properties (or type CTRL+I) to launch the properties dialog box
3. choose the Window Appearance category in the drop down menu
4. click the Customize... button
5. See the attached screenshot for the relevant properties (I think you want these to be unchecked)
I hope this helps!
Best Regards,
JLS
Message Edited by JLS on 04-14-2006 03:04 PM