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java.lang.NullPointerException: 	at co.smartreceipts.android.model.impl.ImmutableNetPriceImpl.getCurrencyCode(ImmutableNetPriceImpl.java:112)	at co.smartreceipts.android.workers.reports.columns.DistanceTableColumns.getFooterValueAt(DistanceTableColumns.java:117)	at co.smartreceipts.android.workers.reports.columns.DistanceTableColumns.getValueAt(DistanceTableColumns.java:54)	at co.smartreceipts.android.workers.reports.writers.CsvTableGenerator.write(CsvTableGenerator.java:28)	at co.smartreceipts.android.workers.EmailAssistant$EmailAttachmentWriter.doInBackground(EmailAssistant.java:585)	at co.smartreceipts.android.workers.EmailAssistant$EmailAttachmentWriter.doInBackground(EmailAssistant.java:339)	at android.os.AsyncTask$2.call(AsyncTask.java:288)	at java.util.concurrent.FutureTask.run(FutureTask.java:237)	at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)	at java.lang.Thread.run(Thread.java:841)