Incorrect DAX Syntax Error Warning

[otykier]

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Describe the bug
The measure below in the Repro steps shows an error with the NOT operator.

To Reproduce
This measure is in the Contoso database:
As a Pct Of A Datum Sales = VAR varTotalADatum = CALCULATE( [Total Net Sales], NOT Products[Brand] IN { "A. Datum", "Contoso" } ) VAR RESULT = DIVIDE( [Total Net Sales], varTotalADatum, 0 ) RETURN varTotalADatum

That measure is valid and works. No syntax error shown in Power BI Desktop or DAX.do.

Expected behavior
No syntax error shown.

Observed behavior
Syntax error shown.

Application specifics

• Tabular Editor version: 3.0 beta 18.4
• Semantic Engine used: Power BI Desktop
• Model Compatibility Level:

Additional context
Add any other context about the problem here.

[otykier]

Transferred from TabularEditor/TabularEditor#856.

[TabularEditor]

Thanks for reporting. This is fixed in BETA-18.5.