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(Integer.java:443)
at java.lang.Integer.parseInt(Integer.java:514)
at com.smj.webui.component.SMJOpenTickets.runTimer(SMJOpenTickets.java:157)
at com.smj.webui.component.SMJOpenTickets.(SMJOpenTickets.java:49)
at com.smj.webui.apps.form.WSimplifiedSales.initOpenTickets(WSimplifiedSales.java:701)
at com.smj.webui.apps.form.WSimplifiedSales.(WSimplifiedSales.java:152)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:534)
at java.lang.Class.newInstance(Class.java:379)
at org.smj.webui.factory.PosFormFactory.newFormInstance(PosFormFactory.java:32)
at org.adempiere.webui.Extensions.getForm(Extensions.java:46)
at org.adempiere.webui.panel.ADForm.openForm(ADForm.java:154)
at org.adempiere.webui.panel.ADForm.openForm(ADForm.java:136)
at org.adempiere.webui.desktop.TabbedDesktop.openForm(TabbedDesktop.java:88)
at org.adempiere.webui.desktop.DefaultDesktop.openForm(DefaultDesktop.java:713)
at org.adempiere.webui.desktop.AbstractDesktop.onMenuSelected(AbstractDesktop.java:76)
at org.adempiere.webui.desktop.DefaultDesktop.onMenuSelected(DefaultDesktop.java:753)
at org.adempiere.webui.panel.AbstractMenuPanel.fireMenuSelectedEvent(AbstractMenuPanel.java:302)
at org.adempiere.webui.panel.AbstractMenuPanel.doOnClick(AbstractMenuPanel.java:251)

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