Novell Documentation: Novell Internet Access Server 4.1 - The subnet mask must be in decimal dot notation, i.e. it must contain 4 numbers separated by. and each number cannot be greater than 255. for example, 255.255.255.0. All the 1 bits must be contiguous and on the left.

The subnet mask must be in decimal dot notation, i.e. it must contain 4 numbers separated by. and each number cannot be greater than 255. for example, 255.255.255.0. All the 1 bits must be contiguous and on the left.

Source: PPPNCF

Explanation: An invalid subnet mask was specified.

Action: Change the subnet mask address and try the operation again.