What does it mean if the build fails with fatal error U1054

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Answer:

If installation of Qt/Windows fails with a message like this:

fatal error U1054: cannot create inline file 'C:\Documents and Settings\user\Local Settings\Temp\nnz00868'

then the Windows system ran out of names for temporary files, or tried to generate a temporary file that already exists. Delete your temporary files and restart your Qt installation to workaround the problem. You might have to close all your other application to be able to do so.