Strophysic stack : No output

[WilliamG_Fr13]

I am trying to perform astrophysics stack with 100 exposure. I added in 'Image Claire' (light exposure) the 100 exposure of M51. I added in the 'Image polarisé' (BIAS) one single bias image (which is already a stack of 100 bias, stacked elsewhere) and I added in 'Image Sombre' (Dark image) 1 single dark frame which is already a stack of 100 dark images. Then I click the 'pile' button (stack). A progress bar appears and progress as expected but, at the end, I do not have any output. No error ,message and the Apply button remain greyed out. 

The input files are all FITS file (including the calibration frame). If I suppress calibration frame, the result is the same: No output. Where can I get some of the Affinity log file to understand the issu ? What am I doing wrong ?

For information, I am under Mac late 2015, Big Sur 11.2.2 OS with Affinity photo 1.9.1. Memory : 16 Go 1867 MHz DDR3

Exposure were taken with a color CCD camera ZWO ASI385MC-cool in 8 bit per data pixel. Exposure are FITS file format. Affinity have no issue in reading the files.

[Dan C]

Hi @WilliamG_Fr13,

Welcome to the Affinity Forums

Our sincerest apologies for the delayed response here, we're currently working through a backlog of tickets, so many thanks for your patience and understanding.

Can you please confirm for me, is this still an issue you can replicate in the latest update of Affinity Photo for macOS (1.9.3)?

Many thanks in advance!