--- a/plugins/check_amanda-client	Sat Jan 25 23:50:20 2014 +0100
+++ b/plugins/check_amanda-client	Tue Jan 28 11:21:36 2014 +0100
@@ -74,11 +74,8 @@
 
     eval { amchecks @confs } or CRITICAL $@;
 
-    my @dles = eval {
-        compare_lists
-          confs   => \@confs,
-          exclude => \@opt_exclude,
-    }
+    my @dles =
+      eval { compare_lists confs => \@confs, exclude => \@opt_exclude, }
       or CRITICAL $@;
     OK 'config: ' . join(', ', @confs), @dles;
 
@@ -183,13 +180,18 @@
 
     my $conf = shift;
     my $_    = qx(amdump_client --config '$conf' check 2>&1);
+
+    /^config:\s+
+      (BUSY Amanda is busy, retry later)/smx
+      and WARNING "$1\n";
+
     /^config:\s+$conf\n
 		 CHECKING\n
 		 .*\n
 		 Client.check:.1.host.checked.in.\d+\.\d+.seconds\.\s+0.problems.found\.\n
 		 .*\n
 		 The.check.is.finished$
-	/smx or die "unexpected output from check:\n$_";
+	/smx or UNKNOWN "unexpected output from check:\n$_";
 }
 
 sub amchecks {