This issue is in PHPExcel/Shared/OLERead.php -- the is_readable function check that throws a PHPExcel_Reader_Exception is failing on a mapped network drive, probably due to the way PHP handles the is_readable function under the hood. The server the map points to has significant read/write security, so I believe this is why it's failing. The PHP server maps the network drive with a user that has R/W permissions however in my cursory reading of the is_readable docs I believe it may be trying to read the file differently somehow (???) not sure on this one.
Anyway, I fixed this in my own system by simply removing this error check, but it's an issue that perhaps could use some examination.
This issue is in PHPExcel/Shared/OLERead.php -- the is_readable function check that throws a PHPExcel_Reader_Exception is failing on a mapped network drive, probably due to the way PHP handles the is_readable function under the hood. The server the map points to has significant read/write security, so I believe this is why it's failing. The PHP server maps the network drive with a user that has R/W permissions however in my cursory reading of the is_readable docs I believe it may be trying to read the file differently somehow (???) not sure on this one.
Anyway, I fixed this in my own system by simply removing this error check, but it's an issue that perhaps could use some examination.
Both servers are IIS.