StarAlignment Multiple images cannot be used as registration references

[ugatza]

I try to align several images, but appears this message: "Multiple images cannot be used as registration references". Is the first time that happens this. Any solution?

[sreilly]

The top selection if for file/image as reference being a single image while the images to be aligned are in the larger box below. Are you sure you are only choosing one image/file?

I've never had an issue with this myself.

Steve

[ugatza]

Yes, only I choose one file/image (file, in this case). It´s strange this error message, in any case. Thank you for your reply, Steve.

[Geoff]

I had a similar problem with dark frames.  Somehow PI had saved the dark and the two rejection frames under one file name.  When I double clicked the filename, three files were revealed. Try double clicking your reference frame and see what happens.
Geoff

[ugatza]

I think that I´ve found the problem. The trouble was in the calibration process. Finally, I´ve took off the darks and now the staralignment works well. Thank you again for the replys.