Error in Ram memory...
 
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20th March 2020 - APP 1.078 has been released !

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Error in Ram memory usage of the OS, stretch module and calibration error Masterflat  

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(@minusman)
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Joined: 3 years ago
Posts: 145
February 16, 2020 01:26  

Hello Vincent and Hello Mabula, I have problems creating a masterflat. I have uploaded a record (folder has the same name as the post), I always get an error message in beta 1.076beta3.

Screenshot (82)

 

In APP 1.0.75 I could create the masterflat without error message.

Bildschirmfoto von 2020 02 16 00 09 41

 

When stretching the integration image, the preview hangs when you move the stretch slider and/or the contrast slider and jump from integration to rejection map. APP must then be restarted.

Screenshot (83)

In APP 1.0.76beta3_Linux version the Ram memory usage display of the OS machine does not work properly. The specification differs strongly from the task manager. In Windows 

...it works.

Bildschirmfoto von 2020 02 16 00 53 43

With kind regards

This topic was modified 2 months ago by Vincent Groenewold - Moderator

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(@vincent-mod)
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February 16, 2020 15:55  

Thanks for letting us know! So the exact same data did work fine on the Linux version.. that's indeed interesting. You did create the masterflat with bias loaded in as well I assume? As it seems to be an error which might indicate that is what's going on.


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(@minusman)
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Posts: 145
February 16, 2020 16:38  

@vincent-mod

Hi Vincent, so the Masterflat is only created with Darkflat. Zwo recommends not to use bias frames for the ASI294, because of AMP glow. In APP 1.075 it worked without any error message.

I have uploaded the frames for testing.
The folder has the same name as the post.

That with Linux refers to the memory usage above left in the screenshot. I opened htop for comparison.

With kind regards


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(@vincent-mod)
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February 16, 2020 18:03  

Thank you, yes I saw your data thanks for uploading! I've let Mabula know.


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(@minusman)
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February 16, 2020 19:17  

Thank you, Vincent.


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(@mabula-admin)
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February 20, 2020 20:41  

Dear @minusman,

Thank you as always for reporting these issues. I will have a look at your data and will check the preview bug as well 😉 The linux memory reporting will be checked as well.

Mabula

Main developer of Astro Pixel Processor and owner of Aries Productions


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(@minusman)
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February 21, 2020 08:58  

Hello Mabula, I have uploaded new calibration frames again. Apparently the problem with the calibration error was caused by the dark frames.


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(@mabula-admin)
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February 21, 2020 17:59  

Hi @minusman,

I have problems creating a masterflat. I have uploaded a record (folder has the same name as the post), I always get an error message in beta 1.076beta3.

I have first checked the data that you first uploaded. First of all, the message that you got is not an error message, it is warning 😉

That message only pops-up  if you have loaded lights, and are creating a masterflat when either:

  1. the flats are not calibrated by bias or darkflats
  2. the lights are not calibrated by bias or darks

Judging from your screenshot, I can only assume that you did not load bias or darks for your lights at the moment, or they were deselected. The message warns you that if you continue like this with calibration of your lights, things will not work properly.

Mabula

Main developer of Astro Pixel Processor and owner of Aries Productions


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(@minusman)
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February 21, 2020 18:21  

Hello Mabula, I have also done further tests, I think the warning message came not without reason.
Because apparently there is a problem with the darkframes. Could a driver update of the camera cause this problem? I had made an update recently.
Because now everything runs without warning. But the integration shows a strange ring-shaped pattern. Maybe caused by short exposure time?

20200221 181433


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(@minusman)
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February 21, 2020 18:33  

I have created new calibration frames and uploaded them in a new subfolder. Maybe this brings more clarity.


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(@mabula-admin)
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February 21, 2020 20:00  
Posted by: @minusman

 

When stretching the integration image, the preview hangs when you move the stretch slider and/or the contrast slider and jump from integration to rejection map. APP must then be restarted.

Screenshot (83)

 

Hi @minusman,

I have located and solved this nasty bug 😉

Added to the release notes of 1.076:

  • FIXED, PREVIEWFILTER & IMAGEVIEWER PANEL, a bug has been located and solved which caused the image viewer panel not to respond any more. If you would load a 16/32bits image and would set the zoom on on one of the B,W,ST, BA, CON sliders of the preview filter to 4 and then load an 8bits image, the previewfilter and imageviewer panel would stop working. This is now solved.

Kind regards,

Mabula

Main developer of Astro Pixel Processor and owner of Aries Productions


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(@mabula-admin)
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February 21, 2020 20:09  
Posted by: @minusman

Hello Mabula, I have also done further tests, I think the warning message came not without reason.
Because apparently there is a problem with the darkframes. Could a driver update of the camera cause this problem? I had made an update recently.
Because now everything runs without warning. But the integration shows a strange ring-shaped pattern. Maybe caused by short exposure time?

20200221 181433

Hi @minusman,

I did not see an obvious problem with the dark frames in terms of metadata or the creation of the fits files, which would have been a reason for mismatching with lights or read problems of the data.

But, if I look at the 15 second darks, they don't look good at all. Especially if you look at 2 different darks:

stretched images of 2 15 second darks:

Master Dark MgenAPP Dark 2020 02 20 23 43 29   15C 15s Bin1x1 G120 MGENAPP  Color St
Master Dark MgenAPP Dark 2020 02 20 23 39 09   15C 15s Bin1x1 G120 MGENAPP  Color St

The apparent banding, if it were part of the sensor's dark signal, should look the same in both darks. It clearly is totally different.... this indicates a problem with the camera I would, or maybe there is electronic interference somewhere ? A bad USB connection perhaps? Is it a new camera?

Mabula

 

 

Main developer of Astro Pixel Processor and owner of Aries Productions


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(@mabula-admin)
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February 21, 2020 20:16  
Posted by: @minusman

I have created new calibration frames and uploaded them in a new subfolder. Maybe this brings more clarity.

Hi @minusman,

Those newly uploaded frames are not better, they have the same issue in terms of banding. I would suggest you check all electronics and probably also the supplier of the camera.

Mabula

 

Main developer of Astro Pixel Processor and owner of Aries Productions


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(@minusman)
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February 21, 2020 20:21  

Hello Manuela, the camera is the same. The difference is the last shots were taken with the new Mgen3 in conjunction with the mgenAPP. The app acts as a man in the middle which loops the camera signal through to control the dithering. I have already written the developer, but haven't heard back yet. If there could be such problems.
I will probably have to fall back on phd2.


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(@minusman)
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February 21, 2020 20:25  

Many thanks for solving the preview problem.


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(@vincent-mod)
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February 21, 2020 20:32  

Just a wild guess, but I had issues a few years ago because my equipment didn't have a common ground. This was leading to a signal on the USB lines and messing with my sensor signal. If you have equipment in between, it is a likely culprit.


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(@minusman)
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February 22, 2020 15:38  

Hello Vincent, can you describe the problems USB ground again exactly. What exactly was the reason for this, disconnections or similar?
I want to do some tests now, but I can already say that mgenAPP and even a short driver update of the recording camera have an influence. But the stripes and darks remain.
But they are also present in much older recordings.


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(@vincent-mod)
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February 22, 2020 15:56  

I had a tiny computer (Pi) with its own power supply and other equipment with another power supply. They didn't have common ground. Apparently this caused a signal on the data-lines, causing background noise, which went away after making it into a common ground circuit (I did this by connecting the Pi to a USB3 hub with its own power and got rid of the power plug on the Pi which didn't have ground to begin with).

This post was modified 2 months ago by Vincent Groenewold - Moderator

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(@minusman)
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Posts: 145
February 22, 2020 18:17  

I use a long active USB cable, between my PC in the house and the mount with USB hub and own power supply in the garden. I want to buy a USB isolator to separate the connection from each other. Because the Usb-Hub is powered by a different circuit than the PC.
Maybe this helps to avoid problems.
Thanks for the tip.


(@vincent-mod)
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Posts: 1451
February 22, 2020 18:33  

Ah, that is interesting. An active USB cable that long might be of influence. Not saying it is, but worth checking out indeed. Good luck!

ps. also make sure that power outlet on the supply in the garden has a good earth as well. And safety wise obviously, take care of that as well. I had 220 in the garden, but put in several measures to keep it "safe". 🙂

This post was modified 2 months ago by Vincent Groenewold - Moderator

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