---
title: "Connectivity Error"
canonical: "https://servicedesk.maxgeo.com/space/LC/1263370316/Connectivity%20Error"
format: markdown
---
**Problem:**
1. The follow error was generated when I tried to view data / save data edits: "The callee (server [not server application]) is not available and disappeared; all connections are invalid." - refer **Cause 1**.
**Cause:**
1. Your connection to the SQL Database has dropped out - refer **Solution 1**.
**Solution:**
1. Close and reopen LeaseControl. This will cause the LeaseControl software to reestablish it's connection. If this does not resolve the error, however, you will require Troubleshooting assistance and may find this can be resolved by your IT team.
**Additional Info:**
- *But what causes it?* The potential causes are quite broad. This may be a temporary issue (e.g. the server hosting the SQL Database has been shut down), a network issue (e.g. your connection was remote, and internet connectivity has dropped out at either end of the connection) or other issue (e.g. the SQL Database has been relocated).
- *What is the relationship between LeaseControl and the SQL Database?* The database hosts the data, the software allows you to view and edit the data in a convenient format. "SQL" is reference to a type of database - there are many!