Appveyor error was due to a bug introduced by myself. not sure why I hadn't seen it on Appveyor previously. It should be fixed in 63c2e9c

Please merge master in here (if the above commit worked). We'll also need some new release notes, but I wouldn't know what version to call it yet!

Perfect, thanks. I merged master now. Will be away all of next week, so you have a bit of time to work out the version number ;-)

@markus-jehl can you please merge master again, and update the release_5.2.htm?

@evgueni-ovtchinnikov will this affect SIRF? (depends on how you catch STIR exceptions). Maybe you can check SIRF with this branch?

Done! The failed test is because some server appears to have been down.

Great. I re-ran the job and it's fine. waiting for @evgueni-ovtchinnikov's input.

I found exactly one occasion of catch(std::string msg) in SIRF and replaced it with catch(…), so I do not expect any SIRF problems with this PR merged.

thanks @evgueni-ovtchinnikov