There is no space for another entry in the table of available servers.
Any action to correct the problem should be performed on that computer. The table of available servers is full. You will not be able to see a complete list of network servers when you type the Net View command or use the LAN Manager Screen.
Stopping other processes or services on the workstation may free enough memory to correct this problem. MS-DOS workstations have a NUMSERVERS entry in the configuration file, which specifies the number of servers that the workstation can list with Net View. Increasing this value can solve this problem, but will also use more memory.