What database? What console?
They're not invisible...they're just unprintable so appear as blanks (which they are not).
Yesterday I came across the fatal error that would prevent me to access databases from the console. I've started calling tech support and figured out that input stream pops up with invisible character(s) that need to be cleared after an input of Data Base ID before pressing an Enter key.
It was invisible bug -- a Ghost In The Machine.
@barts Cognos DB platform
the window where you punch-in DB ID was indeed corrupt as if you would never see anything there even with PCR microscope.
normally it shouldn’t be any issue punching in any DB ID, but in this case there was a ghost character in the window preventing accessing DB due to unwanted and invisible character(s).
Are you trying to explain what visible what not to IT veteran with 30 years behind or what son? First you really need to know what is Ghost In The Machine before we even continue
Not trying to explain anything to you, I thought it humorous that you posted a thread about a DB error, that's all!
I too worked in IT for many decades, now retired. I applaud you for 30 yrs, I know how difficult it can be.
First thing I programmed was on a PDP-11 by hand in binary. Long time ago.