I have decided to calculate my own Mean radiant temperature from my globe thermometer measurements and use that instead of global radiation. This method also avoids problems I was having with the obstacle file because I dont need them anymore.

I couldnt attach file. Below is the text as seen with a text editor.
Its a very simple one. The problem seems to arise from the sun location calculation, which sticks at one value when I add the obstacle file.

# RayMan Pro obstacle file #
g 77.00 5.00 18.00 77.00 35.00 18.00 115.00 35.00 18.00 115.00 5.00 18.00 77.00 5.00 0.00 77.00 35.00 0.00 115.00 35.00 0.00 115.00 5.00 0.00 0.30 0.95
g -22.00 5.00 25.00 -22.00 35.00 25.00 69.00 35.00 25.00 69.00 5.00 25.00 -22.00 5.00 0.00 -22.00 35.00 0.00 69.00 35.00 0.00 69.00 5.00 0.00 0.30 0.95
g -57.00 15.00 28.00 -57.00 35.00 28.00 -39.00 35.00 28.00 -39.00 15.00 28.00 -57.00 15.00 0.00 -57.00 35.00 0.00 -39.00 35.00 0.00 -39.00 15.00 0.00 0.30 0.95
g -57.00 -22.00 20.00 -57.00 3.00 20.00 -39.00 3.00 20.00 -39.00 -22.00 20.00 -57.00 -22.00 0.00 -57.00 3.00 0.00 -39.00 3.00 0.00 -39.00 -22.00 0.00 0.30 0.95
g -57.00 -56.00 17.00 -57.00 -30.00 17.00 -33.00 -30.00 17.00 -33.00 -56.00 17.00 -57.00 -56.00 0.00 -57.00 -30.00 0.00 -33.00 -30.00 0.00 -33.00 -56.00 0.00 0.30 0.95
g -25.00 -56.00 15.00 -25.00 -19.00 15.00 62.00 -19.00 15.00 62.00 -56.00 15.00 -25.00 -56.00 0.00 -25.00 -19.00 0.00 62.00 -19.00 0.00 62.00 -56.00 0.00 0.30 0.95
g 81.00 -54.00 14.00 81.00 -9.00 14.00 115.00 -9.00 14.00 115.00 -54.00 14.00 81.00 -54.00 0.00 81.00 -9.00 0.00 115.00 -9.00 0.00 115.00 -54.00 0.00 0.30 0.95

Hello
After a break on other work I have come back to Rayman and sorry to say im still having the same problems.
It worked very briefly but without any obstacle file. And one of my locations has a lot of trees which I need to model.
As soon as I introduced an obstacle file, the output fails every time, even when i try again without obstacle file after a total software restart. Im using 3.1 beta. It seems there is a problem with elevation and azimuth.

Here is a sample of my input

Date Time Altitude T_air RH Va RAD CLO Metab
02.07.18 12:48 270 31.7 38 3.56 445 0.51 63
02.07.18 13:04 270 32.2 37.1 0.34 581 0.39 101.5
04.07.18 13:08 270 31.9 37.4 2.09 581 0.39 101.5
04.07.18 13:10 270 31.9 37.4 2.09 555 0.39 101.5

And output.

date day of time Latit. Long. Altit. sunr. sunset SDmax SDact elev. azim. SVF_Ray SVF_cos LTF Albedo Bowen Gmax Gact Sact Dact A E Ts Ta VP RH v C Tmrt
d.m.yyyy year h:mm ｰN ｰE m h:mm h:mm min min ｰ ｰ W/mｲ W/mｲ W/mｲ W/mｲ W/mｲ W/mｲ ｰC ｰC hPa % m/s octas ｰC
02.07.18 183 12:48 46.5 11.35 270 04:26 20:11 945 942 40.8 258.5 1 1 0 0.3 1 9999 9999 9999 9999 9999 9999 9999 31.7 17.7 38 3.6 9999 9999
02.07.18 183 13:04 46.5 11.35 270 04:26 20:11 945 942 40.8 258.5 1 1 0 0.3 1 9999 9999 9999 9999 9999 9999 9999 32.2 17.8 37.1 0.3 9999 9999
02.07.18 183 13:08 46.5 11.35 270 04:26 20:11 945 942 40.8 258.5 1 1 0 0.3 1 9999 9999 9999 9999 9999 9999 9999 31.9 17.6 37.4 2.1 9999 9999
02.07.18 183 13:23 46.5 11.35 270 04:26 20:11 945 942 40.8 258.5 1 1 0 0.3 1 9999 9999 9999 9999 9999 9999 9999 31.1 17.6 39.1 1.2 9999 9999
02.07.18 183 13:32 46.5 11.35 270 04:26 20:11 945 942 40.8 258.5 1 1 0 0.3 1 9999 9999 9999 9999 9999 9999 9999 31.6 17.9 38.7 1.2 9999 9999