Return non zero code on failure

src/bioflowinsighterror.py

@@ -43,6 +43,8 @@ class BioFlowInsightError(Exception):
 #* [5] -> A ternary conditional operator was used with an tuple   
 #* [7] -> Tuple with emit (ch1, ch2) = emit.out 
 #* [9] -> Tuple with call (ch1, ch2) = wf()
+#* [11] -> Failed to extract the operation or call at the line x. Try rewriting it in a simplified version.
+