Total Commander

Thanks, I will fix the help. It's correct in history.txt, though...

2ghisler(Author)

Help wrote:/O 0 Never open a new instance in any case. If none is running, do nothing.

Please fix it! Disabling the launch of the first instance was not requested.
It's necessary that TC from other programs like ZxM/USR is opened for the first time!
You can add /O1 if you don't want to change the behavior for /O0.

/O0 means "Never open a new instance in any case, and that's exactly what it does.
Why not just use /O instead?

2ghisler(Author)
The essence of the request was not to open the second instance, etc. I wouldn't interpret the new as the original (first), since the new must be preceded by some existing ("old").
The second instance will be opened with /O, but only one needs to be opened — the first one.

Sorry, I don't understand your explanation. Maybe you can give an example?
Here is how it works now:
/O
TC already running -> path is opened in that instance
TC not running -> new instance is opened with path
/O0
TC already running -> path is opened in that instance
TC not running -> nothing happens

ghisler(Author) wrote: 2023-10-04, 12:36 UTC Maybe you can give an example?

/O1
TC already running -> path is opened in that instance
TC not running -> only the first instance is started and the path is opened

ghisler(Author) wrote: 2023-10-04, 12:36 UTC Here is how it works now:
/O
TC already running -> path is opened in that instance

You forgot to specify the main problem — when running with different rights, a new instance will open.

ghisler(Author) wrote: 2023-10-04, 12:36 UTC /O0
TC already running -> path is opened in that instance

Again, the new instance does not start if the first one is started with different rights.

So your report is about instances with different rights? You can't pass paths to instances with higher rights because Windows doesn't allow it.

ghisler(Author) wrote: 2023-10-05, 09:01 UTC You can't pass paths to instances with higher rights

I didn't understand why to pass paths to existing instances if the request concerns the creation of a new first instance (with the appropriate command line)?

2ghisler(Author)
Will you answer my question?

Sorry but I still don't understand what your point is.

You asked me to give an example. I brought it by analogy with yours.

Fla$her wrote: 2023-10-04, 12:45 UTC

ghisler(Author) wrote: 2023-10-04, 12:36 UTC Maybe you can give an example?

/O1
TC already running -> path is opened in that instance
TC not running -> only the first instance is started and the path is opened

What exactly is unclear in this example?

But that's exactly what /O1 already does!

And in this case, the second instance will not open if the level of rights doesn't match?