Ascom drivers 1.0.3x connection problem

han.k

I'm a software developer. Noted that the CCDciel imaging program can't work with the newer ZWO Ascom drivers starting with 1.0.3x. Older Ascom driver 1.0.2.25 doesn't have this problem.

I'm not the author of CCDciel but can run and modify the code in the compiler. The error is a OleException, divide by 0. See image. Any idea how to fix this and what change in the Ascom inteface could have caused this?

https://www.ap-i.net/mantis/view.php?id=1775

CCDciel ole exception.png

yang

I have just tried our ASCOM driver version 1.0.3.7 with such software, but didn't encounter your problem as attached screen shot, what's your camera model, please try again.

http://astronomy-imaging-camera.com/software/ASICamera%20ASCOM%20Setup%20V1.0.3.7.exe

han.k

The camera is an ASI1600MM-Cool from September 2016. I have tried two computer runnings Win7 and Win10 without success. I have tried up to ASCOM driver 1.0.3.6 and will now try 1.0.3.7 as you suggested. Camera driver is "ZWO ASI Cameras driver Setup V3.0.0.1.exe"

Selecting the driver in the setup works without a problem for all drivers. The error occurs in the code on the moment AscomDriver. Connected Property is set true.

han.k

Hello Yang,

Tried driver 1.03.7. Similar behavior. If you first select camera SETUP to display the ZWO menu then the camera connects without problems. However if you CONNECT directly without using SETUP the exception error occurs. So calling the SETUP seems to set something in the driver which allows connecting.

I tried several thing like using ansistrings rather then unicodestrings for the driver name but nothing fixes the problem. The CCDciel software does nothing special. Create a CreateOleObject and set AscomDriver.Connected property as true.

C-language based programs connect without problems. I have tried ASCOM versions 6.2 and 6.3.

Han

yang

You should configure the setup at first

han.k

yang wrote:
You should configure the setup at first

Yes of course it is required to configure setup. This has been done.

The problem is that next time, the connection fails with division by zero. This can only be prevented by briefly selecting setup. The CCCciel program has no problem with other ASCOM drivers and has no problem with the 1.02.25 driver. Something in the ASCOM interface of the 1.03.x drivers makes it incompatible with CCDciel or better the COM unit of FPC compiler.

I hoped the programmer of the 1.0.3.x driver could give hint what has changed in the driver and if there is a way to solve this compatibility problem.

Han

yang

I can't reproduce your issue, can you provide more detailed procedure to help to find this problom.

han.k

Okay let me try again:

0) Install ZWO ascom driver 1.03.7

1) Install and run CCDciel imaging program.

2) Setup as camera ASI1600MM, run setup and set the camera parameters as required.

3) Connect all. (The camera will connect without problems, camera indication will turn green)

4) Stop the CCDciel program.

5) Restart the CCDciel program, connect all => This will result exception error divide by zero. The camera indication will not turn in green.

The problem in step 5) will not occur with ascom driver 1.02.25.

Can you reproduce this problem?

Regards, Han

chad

Hi han,

Thank you very much!

It is a bug that we didn't test.

Please try this driver:https://astronomy-imaging-camera.com/software/ASICamera ASCOM Setup V1.0.3.8.exe

Thanks

chad

han.k

Yes, Yes Yes, that works !!!

You have found quick a solution. Thank you!

The only thing Im' still hoping for is a solution for the older ASI1600 camera's to control the

"rolling shutter mode and the global shutter mode switch over."

The make my flats, I connect the camera with a USB2.0 extension rather then USB3.0 and expose at 4.99 seconds. See

http://zwoug.org/viewtopic.php?f=29&t=7267

I switch to force usb2.0 mode ?

Best regard, Han

chad

Hi han，

Look at the response to that question.

If you really want to solve that problem, Please contact our customer services after 1600MM/MC-Pro come out.

Thanks

chad