Hi,
First - how many frames are you trying to integrate?
Second, what are the settings that you are using in the StarAlignment Process?
One thing to try and aim for is a setting that gives you around 10 - 50 putative star matches (in other words, each image seems to have about 40-ish stars that the SA porcess has identified as 'usable' in the matching process). Too many, and the process can simply fail because it cannot find a reasonable solution; too few, and you get the error message that you have seen.
You might want to temporarily 'pin' the ProcessConsole window to be 'permanently open', and then you want to clear the output prior to running the SA process, having made a mental note of the settings, or having saved the procees to the Workspace. Run the process, and try to understand what the output is telling you.
Then, see if you can use this feedback information to make an informed decision about which
single parameter you want to change. Change it, clear the ProcessConsole, and re-run the SA Process. Did the change make any observable difference in the feedback reults? If so, are things better, or worse? Make further changes, until you feel happy that you have resolved the issue with at least this one SA parameter. Repeat for other parameters.
Sorry that I can't offer you a "magic bullet" solution - I had similar problems to you, but simply reset the SA Process parameters 'back to default' and did what I have tried to describe to you. I did get there - it may have taken me an hour, but I felt that I was 'in contorl', not just pecking and hacking blindly at all the SA options in the vain hope that something 'good' might happen (it never does
).
Let us know if you get anywhere, or if you are still struggling.