"Adamo ne povis ĉeesti la konferencon en Pollando."

Translation: Adamo could not attend the conference in Poland.

[GastonDorren]

Why is 'be at' incorrect for 'cxeesti'?

[traevoli]

As in English, being at an even is not quite the same as attending it:

• La konferenco okazis ĉe hotelo. La hotelestro estis ĉe la konferenco, sed li ne ĉeestis ĝin.
• (The conference was held at a hotel. The hotel manager was at the conference, but he did not attend it.)

[cdub4language]

Would "be present at" work?

[Lohnesinpr]

ne povi unable?