Hi Igor,
Thanks for that. I will try to reproduce the error in a new Access project to send you.
Meanwhile, can you please clarify what I need to do to compile the 64-bit version of my project - do I register both dlls (32 & 64), and then my original reference will work?
Some more context: my main development environment is 32-bit Office, and I have set up a VM with 64-bit Office to create my 64-bit compiled version. We are setting up a deployment package that will include both .accde's (32 & 64), and which will install the appropriate version depending on the user's Office bitness. (So aside from the compile error, let me know if I am doing anything wrong here)
Also, I should note one more thing: before changing the reference, I tried compiling the Access project as-is under 64-bit Office - it compiled without error, and iGrid appeared to work fine in the application with the little testing I did. I just assumed though that it was still running iGrid 32, and that something would eventually go wrong.
Thanks so much for all the help.