# Causes of run-time errors for global connections

At run time the application logs errors about global connections to diagnostics if:

- The Display Number or Remote Display Number control contains a non-existent display number.
- The time or date received from the data source is invalid.
- The data source triggers a display print but the printer is not responding.
- The data source triggers a display print but the run-time system does not have enough memory to capture the display image.
- Any of the expressions assigned to the connections are invalid or contain invalid assignment statements.
- An expression has been defined to run a macro, and the macro does not exist.

The application logs a warning if the operator attempts to change graphic displays when display changes are controlled remotely (by the data source).

## See also

About global connections

Set up global connections

data source