Hi whenever I start a new VB project I will reference the NationalInstruments.NI4882 DLL and the NationalInstruemnts.Common DLL to my project with no issue. If I go to another PC and open my project for some reason it is not recognizing the two DLL's even though they are installed onto the PC. I double checked version numbers and dates and they are the same, and the VB.NET version installed on the PC's are the same as well. If I remove the two DLL's from my project and then reference the two DLL's from that local machine then it is back to normal. Anyone now what is causing this or how to fix this? This is kind of a big problem since the application will only work on which ever PC it was developed on.