# System Parameters

'FU' | Filename in Uppercase

#### Important Note:
The 'FU' system parameter is included for compatibility purposes only and should not be used.
To avoid potential issues, it is strongly recommended to use the 'FL' system parameter instead.

## Description

When the 'FU' parameter is enabled (On), the system will convert all filenames to uppercase before passing them to the operating system file system. This conversion does not occur on filenames that specify full pathnames to files.

#### Note:
When the 'FU' parameter is set to On, 'FL' is turned off automatically. In addition, the 'FN' system parameter may override the 'FU' setting.

## Default

Off - Filenames are passed in original case.

## See Also

'FL' Filename in Lowercase
'FN' Filename As Is: No Case Conversion
FFN( ) Find File Number (for a UNIX example using these parameters for case insensitive searches)