Source:  MAP.EXE

Possible Cause:  This error occurs when a user tries to map a search drive. LOGIN could not add the variable to the local path environment variable. LOGIN attempts to update the master environment and, upon successful completion, attempts to update its own local environment. The workstation probably does not have enough available memory to allocate the new variables.

Action:  Increase the memory available to the workstation. See Resolving Workstation Memory Problems. (Adding more than 640 KB will not help, because 640 KB is the maximum that can be used.

This is not a serious error; however, you cannot access those search drives (that came back with this error) as search drives until login has been completed. These drives are mapped as regular drives, and because they were successfully placed in the master environment, they can become search drives after login has been completed.