Thanks again for your in-depth answer and the time you have put into the problem. I am somehow embarrassed that I didn't look into the source code myself. My excuse is that I was convinced that somebody out there already had a list showing which value SUBCHAR is under which circumstances.

Regarding using a coderef for CHECK, I think I had got that in the meantime, but IMHO the question remains if a malformed character has an ordinal value at all (quite sure yes, but which?). Since the respective character is malformed, it probably does not have a Unicode code point, so I am unsure about what value shift would return in that case.

In the meantime, I have decided that in my case it is best to use FB_QUIET for CHECK, so examining more deeply is not what I am planning to do. Maybe later ...

I have asked question 2) mainly because I felt that not explaining SUBCHAR is a substantial lack of documentation and was hoping that I had overlooked something.

Thank you very much again!

In reply to Re^4: Question about Encode module and CHECK parameter by Nocturnus
in thread Question about Encode module and CHECK parameter by Nocturnus

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