You attempted to edit the Agent Setup or the Phone Book Setup on a network version of PC Access, and your workstation is running Windows 3.1 without SHARE.EXE loaded. (If your workstation is running Windows 3.1 for Workgroups or 3.11 for Workgroups, you should make sure you have loaded the VSHARE.386 enhanced mode virtual device driver (VxD).) PC Access requires SHARE or VSHARE to enable your instance of PC Access to lock the agent file (PCAWIN.AGT) or phone book file (PCAWIN.PBK) while you edit it. Otherwise, another PC Access user on your network might attempt to edit one of these files at the same time you are editing it. This would corrupt the file.
More precisely, PC Access does not actually lock the PCAWIN.AGT or PCAWIN.PBK files. Instead, PC Access locks regions in the ACCESS.CTL file, and interprets locks on these regions as indicating another instance of PC Access running on the network has locked the corresponding PCAWIN.AGT or PCAWIN.PBK file. To obtain the exact paths to these files on your network, run PC Access with tracing enabled at trace level 2 or higher.
For more information on installing SHARE.EXE, open an MS-DOS window and type:
HELP SHARE
The MS-DOS file locking mechanism has several possible failure modes. For more information, see the Microsoft Knowledge Base articles Q113355 and Q105771, available at the Microsoft Web site:
http://www.microsoft.com/