I have loaded actual version of TMS Component pack.
After that, I wanted to load my project, but message appears, that TAdvGridExcelIO is not available.
Where can I find this object, because in older version it was available?

TAdvGridExcelIO is part of the TMS Component Pack.
What Delphi version do you use?
Make sure the package TMSXLSD??.BPL is effectively installed & active in the IDE.

Thanks. Package was not installed. But I don't know, why, because I have installed whole package.
Nevertheless it's running now.