I am able to successfully build and use an XLL creating using xlw, but only on my own machine. I have confirmed that I am using the 32-bit and 64-bit version where appropriate. In addition to placing the file in the Addins directory on the target machine, what other steps are necessary? I tried adding the addin in Excel...options...addins...manage add-ins. That step seems to finish without any error messages. However, none of the functions are visible. If I then close and restart Excel, I receive the following error message:
"The file you are trying to open, 'MyXll.xll', is in a different format than specified by the file extension. Verify that the file is not corrupted and is from a trusted source before opening the file. Do you want to open the file now?"
If I click yes, it shows a large worksheet of garbage characters. If I click no, nothing happens. Either way, the functions in my xll are unavailable. Any guidance on this issue is appreciated.