Can't able to start Drawer amount in webpos

[Jaison Puloor Alex]

Hi..
I cannot able to start the Drawer amount in webpos, while am entering the amount, am getting the below error..

Error running the simple-method: Error in simple-method operation [<if-not-empty field-name="parameters.confirm" map-name=""/>]: java.lang.RuntimeException: Error in simple-method operation [<if-not-empty field-name="webPosSession" map-name=""/>]: java.lang.RuntimeException: Error in simple-method operation [<if-compare field-name="mgrLoggedIn" map-name="" value="true"/>]: java.lang.RuntimeException: Error in simple-method operation [<if-compare field-name="isOpen" map-name="" value="false"/>]: java.lang.RuntimeException: Error in simple-method operation [<if-compare field-name="isDouble" map-name="" value="true"/>]: java.lang.RuntimeException: Error in simple-method operation [<create-value/>]: java.lang.ClassCastException: Cannot cast java.lang.String to java.math.BigDecimal<br/>null

Please help me to resolve this..
Thanks in advance..:)