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.
Hello,
APP 1.0.83 Beta2 hit an error while calibration.
Error messages:
java.lang.NullPointerException
Â
I've been using APP for a while and never seen an error at the CALIBRATE like this.
Is this a mistake of my operation, or, APP bug?
If this is known issue, please let me know the quick workarounds.
Â
Please find the attached snapshot.
Thanks,
 --Sudo
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@rysudo Can you tell us more about the data? Did you use raw calibration files or previously created masters? If the latter, does this also happen when you use the raw calibration files? And if you are using a master, what version of APP did you create it with?
@wvreeven Thank you for noticing me.
I'm not using master calibration files on this case.
- All files are raw calibration files. 30 lights, 30 darks, 30 flats and 30 darkflats.
- APP 1.0.83 Beta2Â
My camera is ZWO ASI294MCP (OSC) . I had never experience "java.lang.NullPointerException" error with other several nebula files before.
I guess it is data dependent ? Â
This data is short (5sec) exposure of M42 nebula.
Thanks,
 --Sudo