hi, I'm the author of unimg(esxgx).
and your unimg is not up-to-date(the version still have bugs to lead to fail the packing process.
Here is the latest version (fix bugs but no virus alarm), and you can use it in the same way.
please update your ...
Yes I know that, and I'm against everything such. Use standardized ways, let other people work on it, and then the platform can become a really good one, with support, further non-manufacturer development, and so on. Many small chinese manufacture...