Error: "A managed exception was caught in ShowListView()..." when opening an invoice

• Damaged user in Sage 50
• DNS isn't resolving properly

Damaged user in Sage 50

1. Create a new user in Sage 50.
2. Verify that the issue no longer occurs under the new user.
3. Delete the old user.

Verify that DNS resolves properly

1. Ping the server by name

1. Press the Windows key + R to load a Run prompt.
2. Type CMD and then press Enter to open a command prompt.
3. At the command prompt, type ping ServerName (where ServerName is the actual server name).

2. Check the IP address that it returns with the IP address on the server

1. On the server, open a command prompt.
2. At the command prompt type ipconfig and press Enter to get the IPv4 address on the server.
3. Check this IP address with the IP address you received when pinging by the server name above.

If the IP address is different, contact a Network Administrator to resolve the DNS properly.  As a temporary workaround, you can edit the hosts file on the workstation to force proper DNS resolution. See Ping returns 127.0.53.53.