T. Thank you, but I have not tried your furmula yet.
Aladin,
here is an example of master list data.
Activity column D and Descripion Column E. Activity is number.
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<TABLE style="WIDTH: 149pt; BORDER-COLLAPSE: collapse" cellSpacing=0 cellPadding=0 width=198 border=0 x:str><COLGROUP><COL style="WIDTH: 54pt; mso-width-source: userset; mso-width-alt: 2633" width=72><COL style="WIDTH: 95pt; mso-width-source: userset; mso-width-alt: 4608" width=126><TBODY><TR style="HEIGHT: 25.5pt" height=34><TD class=xl30 dir=ltr style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext 0.5pt solid; BORDER-LEFT: windowtext 0.5pt solid; WIDTH: 54pt; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 25.5pt; BACKGROUND-COLOR: green" width=72 height=34>Activity</TD><TD class=xl27 dir=ltr style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext 0.5pt solid; BORDER-LEFT: windowtext; WIDTH: 95pt; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: navy" width=126>Activity Description</TD></TR><TR style="HEIGHT: 14.25pt" height=19><TD class=xl28 dir=ltr style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" height=19 x:num>117</TD><TD class=xl29 dir=ltr style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; WIDTH: 95pt; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent" width=126>Productive Warranty</TD></TR><TR style="HEIGHT: 14.25pt" height=19><TD class=xl28 dir=ltr style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" height=19 x:num>121</TD><TD class=xl29 dir=ltr style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; WIDTH: 95pt; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent" width=126>Productive Warranty</TD></TR><TR style="HEIGHT: 14.25pt" height=19><TD class=xl28 dir=ltr style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" height=19 x:num>122</TD><TD class=xl29 dir=ltr style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; WIDTH: 95pt; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent" width=126>Productive Warranty</TD></TR><TR style="HEIGHT: 14.25pt" height=19><TD class=xl28 dir=ltr style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" height=19 x:num>124</TD><TD class=xl29 dir=ltr style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; WIDTH: 95pt; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent" width=126>Productive Warranty</TD></TR><TR style="HEIGHT: 14.25pt" height=19><TD class=xl28 dir=ltr style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" height=19 x:num>126</TD><TD class=xl29 dir=ltr style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; WIDTH: 95pt; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent" width=126>Productive Warranty</TD></TR><TR style="HEIGHT: 14.25pt" height=19><TD class=xl28 dir=ltr style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" height=19 x:num>136</TD><TD class=xl29 dir=ltr style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; WIDTH: 95pt; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent" width=126>Productive Warranty</TD></TR><TR style="HEIGHT: 14.25pt" height=19><TD class=xl28 dir=ltr style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" height=19 x:num>138</TD><TD class=xl29 dir=ltr style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; WIDTH: 95pt; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent" width=126>Productive Warranty</TD></TR><TR style="HEIGHT: 14.25pt" height=19><TD class=xl28 dir=ltr style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" height=19 x:num>152</TD><TD class=xl29 dir=ltr style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; WIDTH: 95pt; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent" width=126>Productive Warranty</TD></TR><TR style="HEIGHT: 14.25pt" height=19><TD class=xl28 dir=ltr style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" height=19 x:num>153</TD><TD class=xl29 dir=ltr style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; WIDTH: 95pt; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent" width=126>Productive Warranty</TD></TR><TR style="HEIGHT: 14.25pt" height=19><TD class=xl28 dir=ltr style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" height=19 x:num>155</TD><TD class=xl29 dir=ltr style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; WIDTH: 95pt; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent" width=126>Productive Warranty</TD></TR><TR style="HEIGHT: 14.25pt" height=19><TD class=xl28 dir=ltr style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" height=19 x:num>157</TD><TD class=xl29 dir=ltr style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; WIDTH: 95pt; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent" width=126>Productive Warranty</TD></TR><TR style="HEIGHT: 14.25pt" height=19><TD class=xl28 dir=ltr style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" height=19 x:num>160</TD><TD class=xl29 dir=ltr style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; WIDTH: 95pt; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent" width=126>Productive Warranty</TD></TR><TR style="HEIGHT: 14.25pt" height=19><TD class=xl28 dir=ltr style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" height=19 x:num>164</TD><TD class=xl29 dir=ltr style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; WIDTH: 95pt; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent" width=126>Productive Warranty</TD></TR></TBODY></TABLE>
All nine sheets have Activity (numbers) in column N.
'=LOOKUP(9.99999999999999E+307,SEARCH(N2,Activity!$D$2:$D$195),Activity!$E$2:$E$195)
and you see right now, the last row number in master list is 195, (Including 3 blank rows, in case I have to add more),
So, when there is a number in column N of any of the monthly 9 sheets, that is not in the master list it gives me an error on all 17000 rows of the sheet where this new numbers if found, The reason for #N/A error on all cells of column is that I am using =SUMIF(..) formula using the column where lookup formula gives the error.
=SUMIF($AF$2:$AF$16762,AF2,$AC$2:$AC$16762)
and
=SUMPRODUCT(($AF$2:$AF$14258=AF2)*($AD$2:$AD$14258=AD2),$AC$2:$AC$14258)
I hope I explained it better than before.
Thanks