java.lang.NumberFormatException: null

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You try to parse a String that contains non-numeric characters to an int. The string must contain decimal characters only, optionally beginning with a + or - sign.

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java.lang.NumberFormatException: null
at java.lang.Integer.parseInt(
at java.lang.Integer.parseInt(
at com.smj.webui.component.SMJOpenTickets.runTimer(
at com.smj.webui.component.SMJOpenTickets.(
at com.smj.webui.apps.form.WSimplifiedSales.initOpenTickets(
at com.smj.webui.apps.form.WSimplifiedSales.(
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(
at java.lang.reflect.Constructor.newInstance(
at java.lang.Class.newInstance(
at org.smj.webui.factory.PosFormFactory.newFormInstance(
at org.adempiere.webui.Extensions.getForm(
at org.adempiere.webui.panel.ADForm.openForm(
at org.adempiere.webui.panel.ADForm.openForm(
at org.adempiere.webui.desktop.TabbedDesktop.openForm(
at org.adempiere.webui.desktop.DefaultDesktop.openForm(
at org.adempiere.webui.desktop.AbstractDesktop.onMenuSelected(
at org.adempiere.webui.desktop.DefaultDesktop.onMenuSelected(
at org.adempiere.webui.panel.AbstractMenuPanel.fireMenuSelectedEvent(
at org.adempiere.webui.panel.AbstractMenuPanel.doOnClick(

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