I just spent a day chasing this error, uninstalling and re-installing VISA, making sure that 488.2 was installed correclty, ensuring that support for my version of LV is installed, etc.
After playing with several instrument driver examples for awhile, I noticed that all along it was a simple typo with an inappropriate error being thrown, our beloved 1073807202.
Entering a string like GPIB::14::INSTR into a VISA resource control without the quotes throws this error. It needs the quotes: "GPIB::14::INSTR" , then it works fine
Odd that a typo results in an error regarding software libraries being unfound.
I don't mean this as a complaint, it was my fault, just didn't see this info out there, so send some virtual humor my way if this helps someone.
-Ben Phillips