Why does Qfile treats a file as unopened if it is used by some other application/process?
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Why does Qfile treats a file as unopened if it is used by some other application/process?
Because it is unable to open it?
Because the "open" or "closed" state of a file is determined by filehandles, not by what other processes or procedures are doing with the file. A file is always unopened until your code opens it for access.