diff --git a/sstreasury/jinja2/sstreasury/claim_processing.html b/sstreasury/jinja2/sstreasury/claim_processing.html
index d1af607..7569396 100644
--- a/sstreasury/jinja2/sstreasury/claim_processing.html
+++ b/sstreasury/jinja2/sstreasury/claim_processing.html
@@ -2,7 +2,7 @@
 
 {#
     Society Self-Service
-    Copyright © 2018–2020  Yingtong Li (RunasSudo)
+    Copyright © 2018–2021  Yingtong Li (RunasSudo)
 
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU Affero General Public License as published by
@@ -23,6 +23,12 @@
 {% block maincontent %}
 	<h1>Claims processing</h1>
 	
+	{% if error %}
+		<div class="ui error message">
+			An error occurred while generating the ABA file: {{ error }}
+		</div>
+	{% endif %}
+	
 	<form class="ui form" method="POST">
 		<button class="ui small primary labeled icon button" type="submit" name="action" value="Export"><i class="download icon"></i>Export selected to ABA</button>
 		<button class="ui small basic primary labeled icon button" type="submit" name="action" value="ExportXero"><i class="download icon"></i>Export selected for Xero</button>
diff --git a/sstreasury/views.py b/sstreasury/views.py
index 94cfb8e..95b87ee 100644
--- a/sstreasury/views.py
+++ b/sstreasury/views.py
@@ -1,5 +1,5 @@
 #    Society Self-Service
-#    Copyright © 2018–2020  Yingtong Li (RunasSudo)
+#    Copyright © 2018–2021  Yingtong Li (RunasSudo)
 #
 #    This program is free software: you can redistribute it and/or modify
 #    it under the terms of the GNU Affero General Public License as published by
@@ -680,33 +680,39 @@ def claim_processing(request):
 			claims = [c for c in claims if request.POST.get('claim_{}'.format(c.id), False)]
 			claims.sort(key=lambda c: '{}/{}{}/{}'.format(c.payee_name.strip(), c.payee_bsb.strip()[:3], c.payee_bsb.strip()[-3:], c.payee_account.strip()))
 			
-			aba_file = io.BytesIO()
-			
-			aba.write_descriptive(aba_file, bank_name=settings.ABA_BANK_NAME, user_name=settings.ABA_USER_NAME, bank_code=settings.ABA_BANK_CODE, description='Reimburse', date=timezone.localtime(timezone.now()))
-			
-			# CommBank requires only one entry per payee
-			num_records = 0
-			for _, payee_claims in itertools.groupby(claims, key=lambda c: '{}/{}{}/{}'.format(c.payee_name.strip(), c.payee_bsb.strip()[:3], c.payee_bsb.strip()[-3:], c.payee_account.strip())):
-				payee_claims = list(payee_claims)
-				aba.write_detail(
-					aba_file,
-					dest_bsb=payee_claims[0].payee_bsb,
-					dest_account=payee_claims[0].payee_account,
-					cents=sum(c.get_total() for c in payee_claims)*100,
-					dest_name=payee_claims[0].payee_name[:32],
-					reference='RE{}'.format(' '.join(str(c.id) for c in payee_claims)),
-					src_bsb=settings.ABA_SRC_BSB,
-					src_account=settings.ABA_SRC_ACC,
-					src_name=settings.ABA_USER_NAME
-				)
-				num_records += 1
-			
-			aba.write_total(aba_file, credit_cents=sum(c.get_total() for c in claims)*100, num_detail_records=num_records)
-			aba_file.flush()
-			
-			response = HttpResponse(aba_file.getvalue(), content_type='text/plain')
-			response['Content-Disposition'] = 'attachment; filename="claims.aba"'
-			return response
+			try:
+				aba_file = io.BytesIO()
+				
+				aba.write_descriptive(aba_file, bank_name=settings.ABA_BANK_NAME, user_name=settings.ABA_USER_NAME, bank_code=settings.ABA_BANK_CODE, description='Reimburse', date=timezone.localtime(timezone.now()))
+				
+				# CommBank requires only one entry per payee
+				num_records = 0
+				for _, payee_claims in itertools.groupby(claims, key=lambda c: '{}/{}{}/{}'.format(c.payee_name.strip(), c.payee_bsb.strip()[:3], c.payee_bsb.strip()[-3:], c.payee_account.strip())):
+					payee_claims = list(payee_claims)
+					aba.write_detail(
+						aba_file,
+						dest_bsb=payee_claims[0].payee_bsb,
+						dest_account=payee_claims[0].payee_account,
+						cents=sum(c.get_total() for c in payee_claims)*100,
+						dest_name=payee_claims[0].payee_name[:32],
+						reference='RE{}'.format(' '.join(str(c.id) for c in payee_claims)),
+						src_bsb=settings.ABA_SRC_BSB,
+						src_account=settings.ABA_SRC_ACC,
+						src_name=settings.ABA_USER_NAME
+					)
+					num_records += 1
+				
+				aba.write_total(aba_file, credit_cents=sum(c.get_total() for c in claims)*100, num_detail_records=num_records)
+				aba_file.flush()
+				
+				response = HttpResponse(aba_file.getvalue(), content_type='text/plain')
+				response['Content-Disposition'] = 'attachment; filename="claims.aba"'
+				return response
+			except aba.ABAException as ex:
+				return render(request, 'sstreasury/claim_processing.html', {
+					'claims': claims,
+					'error': ex
+				})
 		
 		if request.POST['action'] == 'ExportXero':
 			#claims = models.ReimbursementClaim.objects.filter(state=models.ClaimState.APPROVED.value).all()