php terjadi kesalahan

Informasi teknis
Jenis kesalahan2
Deskripsi kesalahanstream_wrapper_unregister() [function.stream-wrapper-unregister]: Unable to unregister protocol zip://
URLelib.mputantular.ac.id/viewbuku_export.php?
File kesalahanC:\AppServ\www\perpus\plugins\PHPExcel\Shared\ZipStreamWrapper.php
Garis kesalahan69
Query SQL

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