ISERROR - Daxplained

ISERROR is a DAX function that checks whether a value is an error and returns TRUE or FALSE accordingly.

Syntax

ISERROR( Value )

Argument	Properties	Description
Value		The value you want to test.

Return Values

A Boolean value of TRUE if the value is an error; otherwise FALSE.

Remarks

For best practices when using ISERROR, see Appropriate use of error functions.
This function is not supported for use in DirectQuery mode when used in calculated columns or row-level security (RLS) rules.

Example

The following example calculates the ratio of total Internet sales to total reseller sales. The ISERROR function is used to check for errors, such as division by zero. If there is an error a blank is returned, otherwise the ratio is returned.

= IF( ISERROR(
       SUM('ResellerSales_USD'[SalesAmount_USD])
       /SUM('InternetSales_USD'[SalesAmount_USD])
             )
    , BLANK()
    , SUM('ResellerSales_USD'[SalesAmount_USD])
      /SUM('InternetSales_USD'[SalesAmount_USD])
    )

Other functions related to ISERROR are:

Contribute » | Contributors: Rick de Groot
Microsoft documentation: https://learn.microsoft.com/en-us/dax/iserror-function-dax

Syntax

Return Values

Remarks

Example

Related functions