error message
Launching apps that aren't registered with Apple
Years ago as I got my first MacBook I encountered a problem of launching programs from unidentified developers on a Mac. Opening trustworthy and familiar programs from the internet was not a problem, but as soon as I wanted to try something less known or from a less known source, I got the error window saying that it is not possible to open a program from unidentified developer. Back then it wasn't so self explanatory to me how to handle this issue, nor it still is to many of my friends.
Oracle connection error
When you have just installed a database or client Oracle on a computer and want to connect with the parameters that have defined, it generates the error message: ORA-12154: TNS: Could not resolve the connect identifier specified.
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