I am using LV6.1 and Win98 on PXI8156: Sometimes(but not always) attempting to open a vi hangs up and gives the following error dialog box "cannot find VI or one of its components, make sure all components are installed..." but no specific error. Labview then stops responding (as seen in Win Task Manager). I have to powerdown the controller to restore control. I think that I have seen the same message on a WinNT, SCXI system but it flashed so briefly, disappeared, and the vi opened and ran w/o problems that I cannot be sure that it was the same. Anyone seen this or similar problems before, please respond. Thanks.