Thread: Data Validation
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Default Data Validation

Dear All€¦.Please help

Help on Excel -- Data Validation -- Hide Previously Used Items in Dropdown

I have an Excel file with two sheets (Room and Main)

On Sheet €ś Room€ť
(A1:A66) I have room numbers from 1 to 66

(F1:F66) I have formula
=IF(COUNTIF(Main!$A$6:$A$66,A1)=1,"",ROW())

(G1:G66) I have formula
=IF(ROW(A1)-ROW(A$1)+1COUNT(F$1:F$120),"",INDEX(A:A,SMALL(F$1 :F$120,1+ROW(A1)-ROW(A$1))))

On sheet €śMain€ť on A6
I have a Name manager €ś=RoomChk€ť with a formula
=OFFSET(Room!$G$1,0,0,COUNTA(Room!$G$1:$G$120)-COUNTBLANK(Room!$G$1:$G$120),1)

The following message appears:-
The Source currently evaluates to an error. Do you want to continue?

Pls help