I have had this software on two PCs for many years, with the same licence number.

I will contact the support, thanks.

> If I understand correctly Maple 2021 worked. Did 2023.1 ever work or never on your new Laptop?

Sorry, I am wrong, I unistalled Maple 2021 on my desktop; as the laptop i s new, I don't remember if Maple 2023.1 ever worked, because I work on pc and on laptop at the same time; I believe yes.

> Anything particular about the installation folder, installation behind a proxi or admin rights?

Nothing.

> When you start Maple 2023.1: What is written in the lower left corner of the Maple Window? You should either see Ready, Evaluationg or Opening worksheet.

Ready

> How does the mouse cursor look like?

Normal behaviour.

Thanks for your attention

Uninstalled and re-installed Maple 2023.1: nothing has changed

I'm very worried.

Now I remind that the day before the issue I uninstalled Maple 2021 ... 

> For open: Have you tried all of

• crtl-o
• File>Open
• 

Yes, nothing is happening anyway (I can see the hourglass for a moment)

> Can you open recent documents from the file menu File>Recent documents?

No, I can't

> Is File>New followed by and File>Save As also not working?

File>New: nothing is happening
File>Save as: nothing is happening

Sorry, I read the answer by tomleslie and I watched the attached colbasis.mw, but I don't understant how can you find the vectors of ColumnSpace(A) starting from the original columns of A. Thanks for any suggestion.

Yeah, it works, thanks!

@Thomas Richard 

@Carl Love Clear, thank you. Actually in the worksheet there was "with(plots)": if I don't load the plots package, the command "DrawGraph(G,layout=interactive)" works. Thank you all.

Thanks, I'm not sure to competely understand your message but your suggestion works.

Both suggestions are usefull, thanks

Exactly! Thank you

The last one: Maple 2019.2

Thank you, it's quite intricate. I was thinking something easier, like "DrawGraph(G, sizevertex=20)".