Error importing 10.91 project in V11

The best method is to submit a ticket, v11 is still new and there's still bugs, while it's getting there we're all still going to find some issues the more we use it.

@Pixel - I'm stumbling here over the word "session" which practically means what it is, whether API or else.
I mean, in first instance I won't be willing to blame v11 to be incompatible (becoz such posts could lead to
a wrong impression in some half-informed quarters).

"Session" means to me to be an ONLINE CASE where two systems are actively communicating. If one of
the two systems is off (e.g. for maintenance, server reset, down-time etc pp), the "session" cannot happen,
and if you even own a program which is even notifying you about it, like v11, the better.

Next, did you crosscheck the settings between both project versions in regard to the named connection parameters
to be the same? Look, it is a herculean task to make a new version to be 100% downward compatible in regard to
projects of elder versions, and to add a 100% accurate notifying functionality on errors even supercedes the earlier
mentioned herculean task by far. Finally, you did not mention when the error message is happening.

So, let me and else forum members guess what might probably have happened at your end. You imported the old
project into v11 (no error occurred) and you generated new v11 based code for testing very same online (and now
the error occured), right?

"So, let me and else forum members guess what might probably have happened at your end. You imported the old
project into v11 (no error occurred) and you generated new v11 based code for testing very same online (and now
the error occured), right? "

@HJB - No, error occured at the moment I import the project in V11 on my PC and it stops importing. So the project cannot be imported at all.

@pixel

https://www.youtube.com/watch?v=_PmhzLEOi3Q - There is a hole in my bucket - a well known kids song

Rather to join the singing of Henry, what about to simply "drop that very API issue" within a copy
of the old project and to run a second import session by then? Say, to simply re-add that very
API related code and parameters AFTER a successful import into v11 had been happening?

Thanks a lot for your help. That works!
:-)
Peter

Glad you got it working, I would still suggest reporting it as a bug, finding them and reporting is the only way they're going get fixed and fixing this issue may also fix other connected problems.