Question: I have to integrate third party system through `BizTalk 2013`. The third party providing below two option for integration:

1. Flat files [(File Adapter)](https://msdn.microsoft.com/en-us/library/ee253326(v=bts.10).aspx)
2. Web Service API [(WCF-BasicHttp Adapter)](https://msdn.microsoft.com/en-us/library/bb246098.aspx)

What is the best way to integrate and what are the pros and cons of these? I am a beginner and want an expert opinion.

Answer: 
Considering that `/usr/lib/x86_64-linux-gnu/libproxy.so.1` is supplied by Ubuntu, let's assume that it is compatible with the system libstdc++ library. This means that the application is not actually using that system library, but some other version. I'd suggest to check if the application sets `LD_LIBRARY_PATH` and if there is another copy of `libstdc++.so.6` on that path. In this case, try moving it away or deleting it—the application should then switch to the system library, which is newer and should be backwards-compatible.
I also ran into this while installing h3.
The answer by oklas helped me, but expanding on that answer.
The gcc version with `conda install -c anaconda gcc` is 4.8.5. It is **not compatible** with the `libstdc++.so.6.0.22`. So I **uninstalled it and installed a specific verision of gcc** (ver 6) and it solved my problem.