If you look at the Omnis 5.x Help and look for the “Register DLL” command in the upper right part it says “All Platforms” if you look in the Omnis 8.x Help it says only “Windows and Linux “.
In any case, if I try to type the command in the code, I will insert the letter R and the letter E, but the letter G cannot write it.
Do you have a Macintosh ?
Can you try on it ?
Thanks in advance.