This issue was created automatically from an original CUE issue. Further discussion may take place here.
The joined example illustrate a problem in buse.f causing NaN
In this case the crash occur at line 261 of buse.f but it could also occur on line 300 for the opposite flow.
There is no verification that S1-(RD2+H2) is positive...
By the way, in the formula, is this really S1-(RD2+H2) that we should have in this case?