Function "function name" not found in Library "name"

Synopsis
When registering an add-on function in a DLL (via the RXFUNCADD() built-in function), the desired function wasn't found within the DLL. Reginald therefore triggered the FAILURE condition. (So, you can trap errors associated with RXFUNCADD() by trapping FAILURE). function name is the name of the function that can't be found in the DLL.

You can retrieve a more informative error message using the RXFUNCERRMSG() built-in function after RXFUNCADD() fails.

You may need an update to the DLL. Check with the maker of that DLL.