Feature Overview
Preparing for a grand relocation to a brand-new factory tier requires massive financial accumulation and high administrative standing. However, you might occasionally find yourself in a frustrating situation where your top-bar resource counters match or even exceed the stated upgrade costs, yet the green migration button remains stubbornly greyed out and locked. This is not an application freeze or a bug; it is a mechanical side-effect of how the user interface displays compressed, large-scale numbers.
How to Access
This locking phenomenon occurs directly within the Sawmill Upgrade Window (accessed by tapping the factory icon in the bottom-left corner of the screen) when verifying your entry criteria for the next factory level.
Core Mechanics
The mismatch between what you see on your screen and what the game engine calculates behind the scenes is governed by a strict visual optimization system:
The Rounded Numbers Visual System: To prevent messy columns of fractions and dense walls of data from cluttering your mobile interface, Lumber Inc automatically compresses and rounds numbers to the nearest clean decimal point.
The Hidden Decimals Gap: Because of this formatting compression, the interface might display a neat, clean integer (for example, showing that you have exactly 100 aa or 500 Reputation Points). However, your true, uncompressed server value might actually be resting at something slightly lower—like 99.8 aa or 499.7 points.
Strict Validation Gating: The game engine's financial gateway reads your exact uncompressed balances down to the final decimal point. If your true balance is short by even a tiny fraction, the system treats your account as technically underfunded, keeping the progression path locked until the full requirement is met.
Troubleshooting Steps
If your upgrade button refuses to unlock despite displaying the correct values, resolve the hidden decimal deficit using this quick strategy:
Gather a Small Buffer Surplus: Simply spend another minute or two actively running your factory floor. Fulfill one more quick shipping board order, collect a tiny bit more cash from your automated sanders, or complete a fast house build in the Workshop to boost your Reputation points.
Trigger the Activation Threshold: Once your actual, absolute balances crawl past the real hidden requirement, the verification check will pass instantly, and the upgrade button will pop open and become available for selection.