Handle file read error

[paul-henri.ferme]

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Hi all,

I was trying to handle the errot triggered by a user trying to write to
a musical file (ogg in my case) located on a read only file system.

At the moment taglib will dump a debug message (unless NDEBUG is
defined)  to std::cerr. This probably won't be noticed  unless running
from a console.

Is there a way to catch this error and  pop-up a warning message window ?

phf
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