AppleShare PC version 1.0 displayed an "intermittent connection anomaly".
That is,it occasionally dropped connection to the printer, was randomly
unable to see the printer or the servers, and so on.
The primary change in later versions concerned this intermittent network
connection. The first step in resolving the connection issue is to update
all AppleShare PC workstations to the current software (currently, v1.2 is
the latest). There is no point considering other possible causes of
disappearing network resources until the PC workstations are updated.