Take a look at the most common questions
Compilation and Protection options and features
Excel specific questions
Error messages, bugreports
At this moment xlCompiler doesn't cover all spreadsheet functions. We are adding new functions constantly. But, anyway you may get message like in this example:
We've simulated error with YEARFRAC function to get this message.
When xlCompiler processes your file it is automatically switched to the Output Window. This window displays log messages about the current operation. After the compilation, please review Output for possible warnings or error.
If you see message like this, please send it to us - we will add the function you need or resolve the problem occured with your file.