diff --git a/src_main/core/piobject.h b/src_main/core/piobject.h
index 6f7ee3ac..4e6f7f8e 100755
--- a/src_main/core/piobject.h
+++ b/src_main/core/piobject.h
@@ -643,6 +643,7 @@ public:
 #ifdef PIP_CXX11_SUPPORT
 			}
 #endif
+			if (!sender->isPIObject()) break;
 		}
 	}
 	
@@ -672,6 +673,7 @@ public:
 #ifdef PIP_CXX11_SUPPORT
 			}
 #endif
+			if (!sender->isPIObject()) break;
 		}
 	}
 	template <typename T0, typename T1>
@@ -704,6 +706,7 @@ public:
 #ifdef PIP_CXX11_SUPPORT
 			}
 #endif
+			if (!sender->isPIObject()) break;
 		}
 	}
 	template <typename T0, typename T1, typename T2>
@@ -738,6 +741,7 @@ public:
 #ifdef PIP_CXX11_SUPPORT
 			}
 #endif
+			if (!sender->isPIObject()) break;
 		}
 	}
 	template <typename T0, typename T1, typename T2, typename T3>
@@ -774,6 +778,7 @@ public:
 #ifdef PIP_CXX11_SUPPORT
 			}
 #endif
+			if (!sender->isPIObject()) break;
 		}
 	}