Debugging experience

Debugging is a hard thing. Here records some of my experiences.

- A same program instance is running on many machines for years without problem. But today one single machine reports an error. A stored procedure that takes multiple parameters, is now getting those parameters in reverse order.
Reason: A query that returns the list of parameters is now returning the entries in reverse. MSSQL returns data set in undeterministic order if "order by" is not used. It has worked consistently for years on all the machines, now for unknown reason is functioning differently on one single machine.
Solution: Add "order by" clause to the query.

- The Database server in production was accidentally uninstalled ... This happened because the admin logged into the wrong server. As the solution, the desktop background is changed to reflect the server name.