Internal Error Code: 12024, 24704628, 24704922, 27638133

I'm experiencing the FM crash / internal errors while printing some pages in a book since yesterday. The FM I have is v12.02.389, and I'm authoring in unstructured mode as well. I'm wondering if this was the same issue but I'd like to describe this error here rather than create a new but possibly a duplicate post.

FM version: 12.02.389

Internal Error Code: 12024, 24704628, 24704922, 27638133 (I was kind of surprised that four errors came all at once! Man, that's a whole bunch of zombies!)

Repro:

1. Open an existing fm file with more than 3 pages. (The reason of doing so is I was about to print page 64 to 69 of this chapter to PDF)

2. Go to Print Setup > Properties, disable the "Rely on system font...".

3. Save the changes then go back to File > Print and set the pages to be printed(say, 64 to 69).

4. Click Print (to PDF).

Then I saw the progress bar moving but when it reached to the end, a prompt message box came up saying something like  "Framemaker 12 closes due to Internal error 12024, 24704628, 24704922, 27638133".

I'm wondering if it's a bug or it crashes due to some improper settings? The FM12 was doing OK in the past. I've no idea what's going on. I was trying to look for the troubleshooting guide or similar stuff which might allow me find out the solution based on the error codes presented in FM12, but all the search ended up in vain.