UPDATE FROM MABULA
I have had a very rough 2 months unfortunately health wise. I was struck 3x in a row with bacterial infections. The second infection occurred  after a routine hospital checkup and I became very sick. I had to rest and take a lot of antibiotics. Once I was recovering and restarting work 1 month ago, I again became sick. The infection was not yet gone, so even more antibiotics and rest was needed. Needless to say, it took a lot of my energy and I needed a lot of rest.
Finally, the infection is really gone and my energy is coming back step-by-step now and I have started work again. I am terribly sorry to have kept you waiting for support. I will address all outstanding questions and e-mails step-by step and will be on the forum daily from today.
APP 2.0.0-beta47 will come soon as well, a lot of work was already completed before I became very ill, so the release is also nearly ready for you. Beta47 will be much faster actually. Many workflows will be more than 2x faster, mosaics can even be 10x faster than before because registration really received a major boost... all compared to beta46. Â Before I release it, I will make sure that everything is working properly and then I will release it.
I have been using several dual narrowband OSC filters successfully with APP for some time, but  am surprised that several FITS header fields are missing from the extract HA or Extract OIII stacks when these algorithms are used. In a normal OSC stacked integration I see that the RA, DEC, and pixel size information are included, but these header fields seem to be missing when I execute either the HA-OIII Extract HA or HA-OIII Extract OIII algorithms, as well as several other FITS fields. Is there an option to preserve these other header fields  when one of the Extract HA or Extract OIII algorithms are used? Thanks.
Hi Jim @casejim,
Thank you very much for reporting this. I will have a good look at the FITS headers of these dual NB stacks. I also have on my list to include all the important headers for astronometry. SO I will try to fix it soon.
Mabula
All of the headers would be a real valuable addition. Thanks for your efforts to include these. Jim
You are most welcome Jim @casejim,
Thank you very much for mentioning this shortcoming. I will try to have it fixed in the next release version 2.0.0-beta33.
Mabula
Thanks for your work on this Mabula. I will download the new release and appreciate the new functionality. Jim
