how to verify that bufr data is valid

[pat1]

I write some bufr with the dballe API; after some time I try to import the bufr in one DSN but the bufr was rejected.
How can I check that I am writing valid bufr data without insert in in a DSN ?
I attach some rejected bufr
rejected.zip

[spanezz]

I'm not really sure I understand the question.

I see that in rejected.zip you have BUFR data with a temperature measurement, but undefined datetime: One possible answer is that you can make sure you fill datetime (and lat, lon, level, timerange, and so on) before writing observed data.

That is likely not the answer you were looking for: could you spell out your needs a bit more in detail?