Attempting to convert a 2GB to 4GB if the filesystem is not configured to work with 4GB files.
Attempting to open or erase 64-bit MKEYED files on Windows 95 or Windows 98. Currently, the only Windows operating systems to support 64-bit files are Windows NT and 2000. However, access to these 64-bit files through the PRO/5 Data Server is fully supported.
This error does not occur when attempting to create a 64-bit file on a UNIX operating system without LFS enabled.