Count Unique Values With Multiple Conditions, Array Method

Guys,

I need to modify the underneath Count Array Formula to count unique values based on multiple conditions. I can get the formulas to work with NUMERIC values in Column A in the N1 & N2 tabs. However, I cannot get the formula to work when column A contains TEXT values in the TX1 & TX2 tabs.

I've attached the XL file for your review of the project. I appreciate your help.

=SUM(IF(FREQUENCY(IF(('TX1'!$B$2:$B$15=B2)*('TX1'!$C$2:$C$15=C2)*('TX1'!$D$2:$D$15=D2),MATCH('TX1'!$A$2:$A$15,'TX1'!$A$2:$A$15,0)),MATCH('TX1'!$A$2:$A$15,'TX1'!$A$2:$A$15,0))>0,1))