Staff Assigned: Owen Lawrence MaxImDL Heap Corruption when returning data from ASCOM Camera Driver

Hello,

I am new to MaxIm and ASCOM... and I have written an ASCOM Camera driver for an Andor Zyla camera. I used the latest ASCOM and ASCOM C# Driver Template and have the latest MaxIm DL as well. Note that I am using the Demo version of MaxImDL at the moment.

When starting an Exposure from MaxImDL, I can see from the the driver tracelog MaxImDL is getting to the point where MaxIMDL is trying to get the ImageArray. At that point, MaxImDL crashes. Opening the MSVS debugger allows me to see that MaxImDL is experiencing Heap Corruption. I can continue on and MaxImDL gets the data and displays the image just fine. And subsequent Exposure calls will also be successful, albeit with these Heap exceptions along the way. (Image of Heap Corruption Dialog attached.)

I have tried several different ways of allocating and returning the ImageArray. I found several on the web from other ASCOM camera drivers. They all fail the same way and the exception is always at the same place in MaxImDL.

The ASCOM Driver Test Project works fine and I can export the ImageArray data to a file after an Exposure, etc.

I downloaded PhD2 and used my ASCOM driver and camera and it was able to acquire images without any issues (no heap corruption, etc.).

Anyone else see this sort of thing? It may not be specifically related to the Exposure method, but that seems to be the only way I can get it to fail.

Thanks in advance for any insights/suggestions.

-Scott