diff --git a/src/bioflowinsighterror.py b/src/bioflowinsighterror.py
index 83ca4b7f3f5e5fa3d59e772f6897640d4359f780..d76b2965374b5c431d4c19ce01f027d0e5c583bc 100644
--- a/src/bioflowinsighterror.py
+++ b/src/bioflowinsighterror.py
@@ -41,6 +41,8 @@ class BioFlowInsightError(Exception):
 #* [1] -> presence of an import java or groovy (NOT USED RIGHT NOW) 
 #* [3] -> unkonwn thing in a pipe operator  
 #* [5] -> A ternary conditional operator was used with an tuple   
+#* [7] -> Tuple with emit (ch1, ch2) = emit.out 
+        
 
 
 
diff --git a/src/constant.py b/src/constant.py
index 9411239cd88cf34ed7ade5fedda0aaa1ecfc4436..5c11ebce0459a71cba3becd2ccd986d06b280465 100644
--- a/src/constant.py
+++ b/src/constant.py
@@ -66,6 +66,7 @@ EMIT_EQUALS = r"\w+\s*=\s*((\w+)\s*\.\s*(output|out))[^\w]"
 EMIT_NAME = r'(\w+)\s*\.\s*(output|out)\s*\.\s*(\w+)'
 EMIT_OPERATION = r"(\w+)\s*\.\s*(output|out)\s*[^\w]"
 EMIT_TAB = r'(\w+)\s*\.\s*(output|out)\s*\[\s*(\d+)\s*\]'
+TUPLE_EMIT = r'\( *\w+( *\, *\w+)+ *\) *= *'+EMIT_ALONE
 
 
 #        FUNCTION
diff --git a/src/operation.py b/src/operation.py
index 11a5503a48cf093f44b1de65f705e87c7d49bcfc..b5e0da1d0435d7ab593c1b73f4e4f70efa02c684 100644
--- a/src/operation.py
+++ b/src/operation.py
@@ -364,6 +364,15 @@ class Operation(Executor):
                             if(bool(re.fullmatch(constant.WORD, name))):
                                 self.add_origin(name)
 
+            #================================
+            #Case (ch1, ch2, ...) = emit.out
+            #================================
+            pattern= constant.TUPLE_EMIT
+            for match in re.finditer(pattern, operation):
+                raise BioFlowInsightError(f"A tuple is associated with an emit{self.get_string_line(self.get_code(clean_pipe = False))}. BioFlow-Insight doesn't support this (see specification list), try defining the operation in a different way.", num=7, origin=self)
+
+
+
             #================================
             #Case (ch1, ch2, ...) = channel.something
             #================================