Thank You Juan
I attached the compressed xosm.
I really don need the included objects anymore (I already begun a new project whit this images), but it would be interesting to know what is causing this.
This is set of process icons I load every time I begin a a new project with this camera, and then replace the images with new ones and begin processing. Then I save the set as a new project. No other software is involved. Calibration, alignment, stacking, etc is all done in PI.
Regards
Geert