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# setFieldNumber

Changes the field number for a component.

`public setFieldNumber(LrISOField fieldNumber) throws LrISOException`

`public setFieldNumber(int fieldNumber) throws LrISOException`

## Parameters

- fldno: The ISOField number.

## Return values

This function does not return any values.

## General information

This function also verifies that there is no mismatch with the ISO version. If the LrISOField ISO version differs from the previously set version, an LrISOException is thrown.

## Example

Copy code

    LrISOMsg m = new LrISOMsg();
    m.setFieldNumber(ISO87Fields.PAN_PRIMARY_ACCOUNT_NUMBER);

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