asp.net interop memory limitation

Question

I have an asp.net app which uses legacy COM interop library. Works fine until memory reaches somewhere around 500Mb and then it is no longer able to create new COM objects (get various exceptions, e.g. Creating an instance of the COM component with CLSID {FFFF-FFFF-FFFF-FFF-FFFFFF} from the IClassFactory failed due to the following error: 80070008.). It almost looks like it is hitting some kind of memory limit, but what is it? Can it be changed?

Solved! Turns out the object was creating a Window handle and we were hitting the 10K Window handles limit (except it was happening at 2K instances for some reason when inside IIS)

Answer 1

Solved! Turns out the object was creating a Window handle and we were hitting the 10K Window handles limit (except it was happening at 2K instances for some reason when inside IIS)