I just had a guy send me a mansion he had done where the Level Builder was crashing whenever he tried to make changes to a room and save it.

After digging around, I discovered that he was running up against a "resource file size limit" that I had forgotten about and never documented. The problem is, I now can't find the documentation. So I don't know what the actual number is. It is either 2727, or double that -- 5454.

Anyway, this guy's mansion has 5447 resources in it. Each room requires a minimum of 12 resources (and each sign adds an additional resource to that total). Plus a handful of other resources needed for the mansion in general. So if you have 100 rooms in your mansion, you can assume it has somewhat over 1100 resources.

This guys' mansion happens to have 452 rooms. That times 12 is 5424, plus the other resources for the signs and the mansion data totals around 5454, where the builder started crashing for him.

This issue will NOT be an issue once I port the Mansion Builder to be HD, because it no longer uses resources to store the mansion data. (This is what happens when you "convert" a mansion to the HD format using Rezycle.)

However, since you are all designing mansions using the old level builder in the meantime, I wanted to let you know about this issue, so you don't add too many rooms to your mansion!

Hmmm... I wonder how many rooms are in Freddy's MM&M :)

MM&M has 451 rooms!

OK and how many resources?  I'm asking because I have converted MM&M to the HD and it works with minor changes.  I haven't uploaded it yet because Freddy hasn't given me the permission to do so.
And of course MM&M does not crash the level builder either.

Yeah, see I'm using Mansion Level Builder 2, and right now my mansion has 443 rooms. My mansion is expecting to have around 500+ rooms, though. What's the maximum number of rooms I can have in that mansion builder?