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MAY 4 2026: APP 2.0.0-beta44 has been released !

New improved internal memory controls should now work on all computers

May 1 2026: APP 2.0.0-beta43 has been released !

Improved internal memory controls (much more stable and faster on big datasets), fixed CPU image viewer, fixed Narrowband extraction demosaic algortihms.

Apr 29 2026 APP 2.0.0-beta42 has been released !

New improved Normalization engine, Fixed random crashes in integration, fixed RGB Combine & Calibrate Star Colors, fixed Narrowband extraction algorithms, new development platform with performance gains, bug fixes in the tools, etc...

Apr 14 2026: Google Pay, Apple Pay & WeChat Pay added as payment options

Update on the 2.0.0 release & the full manual

We are getting close to the 2.0.0 stable release and the full manual. The manual will soon become available on the website and also in PDF format. Both versions will be identical and once released, will start to follow the APP release cycle and thus will stay up-to-date to the latest APP version.

Once 2.0.0 is released, the price for APP will increase. Owner's license holders will not need to pay an upgrade fee to use 2.0.0, neither do Renter's license holders.

 

Looking for help with error message when calibrating

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(@kevinkalikimaka)
Molecular Cloud
Joined: 4 years ago
Posts: 2
Topic starter  

Astro Pixel Processor - 2.0.0-beta36
Oracle GraalVM 23.0.2+7.1 - Windows-64-bit

Encountered error in module:
CreateCalibrationDetails

Error message:
java.lang.NullPointerException: Cannot read the array length because "<local7>" is null

Cause:
Cannot read the array length because "<local7>" is null
dj.a(CreateCalibrationFramesActionListener.java:1559)
dj.doInBackground(CreateCalibrationFramesActionListener.java:1093)
java.desktop/javax.swing.SwingWorker$1.call(Unknown Source)
java.base/java.util.concurrent.FutureTask.run(Unknown Source)



   
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(@Anonymous 174)
Joined: 9 years ago
Posts: 5702
 

Can you explain a bit more about your workflow? What is your setup and what data are you loading etc?



   
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(@mabula-admin)
Universe Admin
Joined: 9 years ago
Posts: 5254
 

Hi Kevin @kevinkalikimaka,

Can you share a bit more? What kind of frames are you loading, OSC versus monochrome? Are you using darks, bias, flats, darkflats?

Mabula



   
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(@jdwood)
Red Giant
Joined: 6 years ago
Posts: 54
 

not sure if this helps but I am experiencing a similar (but not exactly the same) error with beta 37 which I have not seen before:

APP error

This occurs (sporadically) after a normal integration sequence when I go back to save the calibrated lights. The lights save fine but then the console seems to keep on doing 'something' in the background for some time and eventually this error is produced. 

It doesn't seem to have have any real consequences (at least for me) as the calibrated lights are saved OK before any of this happens...

Using Apple M1 Mac

Jon



   
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(@mabula-admin)
Universe Admin
Joined: 9 years ago
Posts: 5254
 

Hi Jon @jdwood,

I am looking at the moment at the issue of Kevin @kevinkalikimaka, I can solve that one I think now, I will also look at your issue while I am at it 😉

Mabula



   
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(@kevinkalikimaka)
Molecular Cloud
Joined: 4 years ago
Posts: 2
Topic starter  

I was using an M1 MacBook, and I've figured out what happened—100% user error on my part. Scale master dark was selected for the calibration, which requires the master bias. I had mapped the master bias file to the bad pixel map by mistake.

TY to all who considered this.



   
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(@jhart)
Neutron Star
Joined: 6 years ago
Posts: 75
 

Regarding your last post, I may be wrong but my understanding is that a Master Dark used for Scaling must be created with Dark frames and Bias frames, not using a Master Bias file????



   
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(@mabula-admin)
Universe Admin
Joined: 9 years ago
Posts: 5254
 

Posted by: @kevinkalikimaka

I was using an M1 MacBook, and I've figured out what happened—100% user error on my part. Scale master dark was selected for the calibration, which requires the master bias. I had mapped the master bias file to the bad pixel map by mistake.

TY to all who considered this.

Hi Kevin @kevinkalikimaka, that is great. Thank you very much for your feedback. I did implement a fix for this error and it should not happen again with 2.0.0-beta38 or later 😉

https://www.astropixelprocessor.com/community/release-information/astro-pixel-processor-2-0-0-beta38-release-notes-work-in-progress/#post-33068

@jhart that is not correct, to have scaling working on the masterDark, the MasterBias must be present. The MasterBias is subtracted form the MasterDark and then a noise analysis on the subtracted MasterDark determines the scaling factor(s).

 


This post was modified 12 months ago by Mabula-Admin

   
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(@mabula-admin)
Universe Admin
Joined: 9 years ago
Posts: 5254
 

Posted by: @jdwood

not sure if this helps but I am experiencing a similar (but not exactly the same) error with beta 37 which I have not seen before:

APP error

This occurs (sporadically) after a normal integration sequence when I go back to save the calibrated lights. The lights save fine but then the console seems to keep on doing 'something' in the background for some time and eventually this error is produced. 

It doesn't seem to have have any real consequences (at least for me) as the calibrated lights are saved OK before any of this happens...

Using Apple M1 Mac

Jon

Hi @jdwood,

That doing "something" in the background is indeed also something that I will fix. I will try to reproduce your issue on my mac and fix this as well.

Mabula

 



   
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