The umask of the AcuAccess file is ignored by AcuLaunch on Windows NT/2000 servers. On UNIX servers, the umask of the runtime process started for the user will be the umask given in the AcuAccess file. Any new files created by the runtime will have permissions based on that umask.
On UNIX servers, the umask is a variable having a three-digit octal value, similar to that used by chmod, but which describes the permissions that are not to be set on new files. The value of each digit, subtracted from seven, gives the corresponding chmod value. For instance a umask of 002 corresponds to a chmod value of 775 (however, because execute permission is not applicable to data files, AcuLaunch actually sets the chmod value to 664). A umask of 002 grants read and write permissions to user and group, and read only permissions to other. Another common umask is 007, which sets read and write permissions for user and group, and no permissions for other. For more about umask see your UNIX operating system documentation.