error in logic of EPSSetUp (?)

[Tobias Möhle]

Dear all,

I am not sure if I misunderstand the logic in there, but for me it looks as if there is an error in the EPSSetUp-function (line 272 ). As I see it, the respective error-message is printed if three conditions are fulfilled:

1) flg is true (i.e. STSINVERT or STCAYLEY is set)

2) eps->categ is either EPS_CATEGORY_KRYLOV or EPS_CATEGORY_OTHER

3) eps->which is one of the EPS_TARGET_*.

And this error says: If I set STSINVERT, I should set eps->which to e.g. EPS_TARGET_MAGNITUDE. So I would expect that the third condition should be reversed, so that the error comes if I didn't set the target properly.

If I am wrong, I would highly appreciate some explanation what goes on there.

Thank you very much.

[Jose E. Roman]

The condition that is implemented in the code is the opposite of your condition 3: eps->which is NOT any of EPS_TARGET_*. So the code seems correct. If you are getting this error unexpectedly, tell us which settings you use.

[Tobias Möhle]

oh, you are right. It is true only if all eps->which are not the EPS_TARGET_*. This was my fault. I do get this error unexpectedly and just thought it was this reason; but maybe my expectations are just wrong :-) Let me just check my code; but maybe it is than still on my side. Anyway, thank you very much for the fast response.

[Tobias Möhle]

ok; it turned out that it was indeed my own problem; I probably should have investigated it before in more detail. But thank you very much for your kind help.

[Tobias Möhle]

false alarm