- Resource editor for Heroes.

what does the message in ResEdit "read beyond end of file" mean?
A direct translation doesn't make much sense - read past the end of the file.

I haven't actually delved into the resources of "Heroes" (although ResEdit was installed with the WoG localization as a bonus), but the meaning of the message is exactly that: an attempt to read data beyond the end of the file. It's like asking what letter is in the 10th position of a 7-letter word. As for why the error occurs, you should ask the experts, describing in detail what and how you are trying to do.