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-rw-r--r--grc/base/Connection.py7
1 files changed, 5 insertions, 2 deletions
diff --git a/grc/base/Connection.py b/grc/base/Connection.py
index dd74f2d660..abe8b4fc97 100644
--- a/grc/base/Connection.py
+++ b/grc/base/Connection.py
@@ -86,8 +86,11 @@ class Connection(Element):
sink_domain = self.get_sink().get_domain()
if (source_domain, sink_domain) not in platform.get_connection_templates():
self.add_error_message('No connection known for domains "%s", "%s"' % (source_domain, sink_domain))
- multiple_sinks = platform.get_domain(key=self.get_source().get_domain())['multiple_sinks']
- if not multiple_sinks and len(self.get_source().get_connections()) > 1:
+
+ if (source_domain in platform.get_domains() and
+ not platform.get_domain(key=source_domain)['multiple_sinks'] and
+ len(self.get_source().get_connections()) > 1
+ ):
self.add_error_message('Source domain "%s" can have only one downstream block' % source_domain)