sir,
while I am selecting flow tab from vapor gui it is working fine but when I am selecting DVR tab and then I clicked to instance tick mark,it is showing an error messages of error code 4002 - VAPOR_ERROR_GL_UNKNOWN_UNIFORM. So, whether it is related to my .vdf file or graphics driver problems.
Thanks.
This sounds like a graphics driver problem. What platform are you on (Mac, linux, or windows), what version of the OS are you running, and what kind of graphics card do you have?