Resolving Compile Error: Required class relationships must be maintained

I recently stumbled upon this error while making an update to an Apex class in one of my managed packages.

I was quite baffled by this because my change was minor logic within an existing method. I had not changed which interfaces were being implemented or extended and the constructors were all the same.

Read my full blog post where I show how the Winter '18 Apex Compiler Changes were the root of my issue and how I fixed it by explicitly using the System namespace.

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I’m a Salesforce Developer and Technical Leader. Learn more about my passion for Salesforce.com solutions @DouglasCAyers and douglascayers.com.