Help with 'the syntax for 'PreviousDay' is incorrect' error

PREVIOUSDAY happens to be the name of a DAX function.  Use a different name for your variable.

Hi Belle2015 

Reserved words, such as function names, cannot be used as variable names. My typical approach is to prefix the variable name with an underscore (_), just in case a future function with the same name as an existing variable is created.

Hello Belle2015 ,

PREVIOUSDAY is a DAX function and reserverd keyword in DAX. As per guideline we can not use existing reserved word or functions anywhere in dax code hence you see this error. Replace this variable with other names like VAR_PREVIOUS_DAY or _PREVIOUSDAY and run your code again.

I hope this answers your query.

Warm Regards,

Neeraj Kumar