Getting #Error on a report field

I have this control source for a field on a report but I'm getting #Error in the field if txtStandardWidthInInches is empty.

=IIf([txtStandardWidthInInches]="","",(CInt([txtStandardWidthInInches]/12) & "' " & [txtStandardWidthInInches] Mod 12 & """"))

How can I get rid of the #Error ?
SteveL13Asked:
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Phillip BurtonDirector, Practice Manager and Computing ConsultantCommented:
try

=IIf(IsNull([txtStandardWidthInInches]),"",(CInt([txtStandardWidthInInches]/12) & "' " & [txtStandardWidthInInches] Mod 12 & """"))

or

=IIf(nz([txtStandardWidthInInches],"")="","",(CInt([txtStandardWidthInInches]/12) & "' " & [txtStandardWidthInInches] Mod 12 & """"))
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SteveL13Author Commented:
This did it...

=IIf(IsNull([txtStandardWidthInInches]),"",(CInt([txtStandardWidthInInches]/12) & "' " & [txtStandardWidthInInches] Mod 12 & """"))

Thanks!
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Scott McDaniel (Microsoft Access MVP - EE MVE )Infotrakker SoftwareCommented:
Better yet - for a Report, create that field in the Query, instead of forcing Access to do that calculation in the report:

SELECT Col1, Col2, Nz(YourWidthColumn,0) / 12 & "' " & Nz(YourWidthColumn,0) MOD 12 & """ AS MyNewWidthColum FROM SomeTAble

Your query will not contain a column named "MyNewWidthColumn", and you can drop it directly on the report.
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