Suppose a row height is so long that it is spread on two pages.
Using this option will do the job
<columnHeader>
<band height="20" splitType="Prevent">
<staticText>
</staticText>
</band>
</columnHeader>
<detail>
<band height="18" splitType="Prevent">
<textField isStretchWithOverflow="true" isBlankWhenNull="false">
.....
</textField>
</detail>
Using this option will do the job
<columnHeader>
<band height="20" splitType="Prevent">
<staticText>
</staticText>
</band>
</columnHeader>
<detail>
<band height="18" splitType="Prevent">
<textField isStretchWithOverflow="true" isBlankWhenNull="false">
.....
</textField>
</detail>