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# unset

Clears a field setting, if the field exists. Ignores if the field does not exist.

`public void unset(LrISOField fldno) throws LrISOException`

`public void unset(int fldno) throws LrISOException`

## Parameters

- fldno: The ISOField number.

## Return values

This function does not return any values.

## Example

Copy code

    LrISOMsg m = new LrISOMsg();
    m.set(ISO87Fields.PAN_PRIMARY_ACCOUNT_NUMBER, "1234567891234567890");
    m.unset(ISO87Fields.PAN_PRIMARY_ACCOUNT_NUMBER);

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