diff --git a/Implab/AbstractPromise.cs b/Implab/AbstractPromise.cs
--- a/Implab/AbstractPromise.cs
+++ b/Implab/AbstractPromise.cs
@@ -27,10 +27,8 @@ namespace Implab {
                 if ((m_mask & PromiseEventType.Success) != 0 && m_handler != null) {
                     try {
                         m_handler();
-                    } catch (Exception err) {
-                        // avoid calling handler twice in case of error
-                        if (m_error != null)
-                            SignalError(err);
+                        // Analysis disable once EmptyGeneralCatchClause
+                    } catch {
                     }
                 }
             }
@@ -55,8 +53,8 @@ namespace Implab {
                 if (m_cancel != null) {
                     try {
                         m_cancel(reason);
-                    } catch (Exception err) {
-                        SignalError(err);
+                        // Analysis disable once EmptyGeneralCatchClause
+                    } catch {
                     }
                 } else if ( (m_mask & PromiseEventType.Cancelled) != 0 && m_handler != null) {
                     try {
diff --git a/Implab/AbstractPromiseT.cs b/Implab/AbstractPromiseT.cs
--- a/Implab/AbstractPromiseT.cs
+++ b/Implab/AbstractPromiseT.cs
@@ -39,16 +39,14 @@ namespace Implab {
                 if (m_success != null) {
                     try {
                         m_success(result);
-                    } catch(Exception err) {
-                        SignalError(err);
+                        // Analysis disable once EmptyGeneralCatchClause
+                    } catch {
                     }
                 } else if ((m_mask & PromiseEventType.Success) != 0 && m_handler != null) {
                     try {
                         m_handler();
-                    } catch(Exception err) {
-                        // avoid calling handler twice in case of error
-                        if (m_error != null)
-                            SignalError(err);
+                        // Analysis disable once EmptyGeneralCatchClause
+                    } catch {
                     }
                 }
             }
@@ -73,8 +71,8 @@ namespace Implab {
                 if (m_cancel != null) {
                     try {
                         m_cancel(reason);
-                    } catch (Exception err) {
-                        SignalError(err);
+                        // Analysis disable once EmptyGeneralCatchClause
+                    } catch {
                     }
                 } else if ((m_mask & PromiseEventType.Cancelled) != 0 && m_handler != null) {
                     try {