What do these error messages mean?

[H08590]

I recently did a search of files among some folders. The only perameters were
name & lcoation: *.* and
contents: structural ministry

I received 2 error messages. The first was:
"Run Time error '97':
Can not call friend function on object wheich is not an instance of defining class.

Immediately after I clicked on the "OK" of that message, I received a new message:

Run time error '5':
Invalid procedure call or argument.

Immediately after I clicked on the "OK" of that message, XY closed.

What happened?

I noticed that when I tried the search again later and by mistake I had the wrong folder selected, I did not get an error message.

[admin]

Hard to say.

Can you reproduce the error at will, or at least with a good chance?

[H08590]

Hard to say.

Can you reproduce the error at will, or at least with a good chance?

This particular situation occurs each time I use the same perameters. On most searchs I have no problems. However, in the past I have had some similar situations where I received an error message and XY closed. This is the first time I paid too much attention to the exact messages I was receiving and I don't remember what I was searching for in the previous situations.

[admin]

Can anybody reproduce this? I can't.

[serendipity]

Can anybody reproduce this? I can't.

Me too, tried the fresh install too.

@H08590:
Can you try the same parameters in the freshly installed XY?