iProperty SDK editor system.OverflowException Unhandled exception

[andrew_canfield]

Hello,

Trying a program from the SDK & seeing these returned - what do the messages mean & how are they fixed?

Thanks for taking a look. The error occurs when trying to edit an iproperty of an .idw, the file is read/write.

(same result for .ipt .iam)

Regards

Andrew

[AlexKorzun]

AddrOfPinnedObject() returns IntPtr:

https://docs.microsoft.com/en-us/dotnet/api/system.runtime.interopservices.gchandle.addrofpinnedobje...

IntPtr.ToInt32() is described at:
https://docs.microsoft.com/en-us/dotnet/api/system.intptr.toint32?view=netframework-4.8

The Exceptions section reads:

OverflowException
On a 64-bit platform, the value of this instance is too large or too small to represent as a 32-bit signed integer.

You should probably use .ToInt64() instead, which returns long. This will require other changes in your code.