Pipe X temperature is equal to or greater/less than the max/min temperature limit of Y

Full message is:

Pipe X temperature is equal to or greater than the maximum temperature limit of Y set by the user in the Pressure and Temperature Limits panel of Analysis Setup. Results may be incorrect.

The user has temperature limits in the Pressure and Temperature Limits panel. These are to control the search space for temperatures while solving. However, the final solution had one or more pipes at the temperature limit. This means the temperature results are likely incorrect. To resolve this either remove or change the temperature limit.