We have found next stacktrace in our server log.
[digestScheduler_Worker-1] 13 июл 2011 08:00:02,952 [com.iqmen.export.BaseDocumentBuilder] 11769901 java.lang.IllegalArgumentException: displayText
java.lang.IllegalArgumentException: displayText
at asposewobfuscated.jr.a(MiscUtil.java: 322)
at com.aspose.words.DocumentBuilder.insertHyperlink(DocumentBuilder.java: 797)
at com.iqmen.export.callback.DoclistCallback.fieldMerging(DoclistCallback.java: 40)
at com.aspose.words.MailMerge.a(MailMerge.java: 430)
at com.aspose.words.yc.a(MailMergeRegion.java: 326)
at com.aspose.words.ni.a(FieldMergeField.java: 157)
at com.aspose.words.ni.Fm(FieldMergeField.java: 134)
at com.aspose.words.Field.a(Field.java: 396)
at com.aspose.words.ol.a(FieldUpdater.java: 144)
at com.aspose.words.ol.l(FieldUpdater.java: 101)
at com.aspose.words.oi.execute(FieldUpdateExecutionItem.java: 81)
at com.aspose.words.ol.hd(FieldUpdater.java: 91)
at com.aspose.words.ol.a(FieldUpdater.java: 67)
at com.aspose.words.yc.a(MailMergeRegion.java: 257)
at com.aspose.words.yc.Th(MailMergeRegion.java: 233)
at com.aspose.words.yc.a(MailMergeRegion.java: 70)
at com.aspose.words.MailMerge.executeWithRegions(MailMerge.java: 162)
at com.iqmen.export.BaseDocumentBuilder.generateDocument(BaseDocumentBuilder.java: 149)
at com.iqmen.export.BaseDocumentBuilder.generateDocumentStream(BaseDocumentBuilder.java: 162)
at com.iqmen.core.business.subscribe.DigestExporter.export(DigestExporter.java: 151)
at com.iqmen.core.business.subscribe.DigestJob.execute(DigestJob.java: 32)
at org.quartz.core.JobRunShell.run(JobRunShell.java:199)
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:546)
[digestScheduler_Worker-2] 13 июл 2011 08:00:02,992 [com.iqmen.export.BaseDocumentBuilder] 11769941 java.lang.IllegalArgumentException: displayText
java.lang.IllegalArgumentException: displayText
at asposewobfuscated.jr.a(MiscUtil.java: 322)
at com.aspose.words.DocumentBuilder.insertHyperlink(DocumentBuilder.java: 797)
at com.iqmen.export.callback.DoclistCallback.fieldMerging(DoclistCallback.java: 40)
at com.aspose.words.MailMerge.a(MailMerge.java: 430)
at com.aspose.words.yc.a(MailMergeRegion.java: 326)
at com.aspose.words.ni.a(FieldMergeField.java: 157)
at com.aspose.words.ni.Fm(FieldMergeField.java: 134)
at com.aspose.words.Field.a(Field.java: 396)
at com.aspose.words.ol.a(FieldUpdater.java: 144)
at com.aspose.words.ol.l(FieldUpdater.java: 101)
at com.aspose.words.oi.execute(FieldUpdateExecutionItem.java: 81)
at com.aspose.words.ol.hd(FieldUpdater.java: 91)
at com.aspose.words.ol.a(FieldUpdater.java: 67)
at com.aspose.words.yc.a(MailMergeRegion.java: 257)
at com.aspose.words.yc.Th(MailMergeRegion.java: 233)
at com.aspose.words.yc.a(MailMergeRegion.java: 70)
at com.aspose.words.MailMerge.executeWithRegions(MailMerge.java: 162)
at com.iqmen.export.BaseDocumentBuilder.generateDocument(BaseDocumentBuilder.java: 149)
at com.iqmen.export.BaseDocumentBuilder.generateDocumentStream(BaseDocumentBuilder.java: 162)
at com.iqmen.core.business.subscribe.DigestExporter.export(DigestExporter.java: 151)
at com.iqmen.core.business.subscribe.DigestJob.execute(DigestJob.java: 32)
at org.quartz.core.JobRunShell.run(JobRunShell.java:199)
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:546)
What does it means? And what should we do to prevent it in future?