The Critical Diagnostics with ref. #43568 reads: "e-file Prepare & attach a schedule of net income (loss) from rental real estate activities."  The Search box turned nothing.  When I clicked on the diagnostic the Lacerte took me to Name control in the Electronic Filing.  Screen 4 in the partnership module.
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PhoebeRoberts
Level 11
Level 11

Is that a state diagnostic? If so, what state?

Oklahoma has a similar diagnostic. I just print the OK Schedule E to PDF and attach it to the e-file. 

Note that handling the diagnostic appropriately may or may not result in its disappearance from the list. Critical Diagnostics don't interfere with e-filing.