Gnuplot barchart histogram with errorbars

I want to the results of my benchmarks. I compare two virtual machines with each other and have data of the following form:

BENCHMARK VM1_TIME VM1_ERROR VM2_TIME VM2_ERROR

I want to generate a barchart diagram from this data which should look like this:

Could somebody provide the code how to do this? I know this kind of request is unbeloved, but I really need this and googled for something like 2 hours, without a satisfactoring result.

Thanks in advance,
Sven