diff --git a/src/eGLock.erl b/src/eGLock.erl
index ecca3a6..f9df23c 100644
--- a/src/eGLock.erl
+++ b/src/eGLock.erl
@@ -124,13 +124,13 @@ lockApply(KeyOrKeys, MFAOrFun, TimeOut) ->
 				true ->
 					try doApply(MFAOrFun)
 					catch C:R:S ->
-						{error, {lockApplyError, {C, R, S}}}
+						error({lockApplyError, KeyOrKeys, MFAOrFun, {C, R, S}})
 					after
 						eNifLock:releaseLocks(KeyIxs),
 						ok
 					end;
 				lockTimeout ->
-					{error, lockTimeout}
+					error({lockTimeout, KeyOrKeys, MFAOrFun})
 			end;
 		_ ->
 			KeyIx = erlang:phash2(KeyOrKeys, ?eGLockSize),
@@ -138,13 +138,13 @@ lockApply(KeyOrKeys, MFAOrFun, TimeOut) ->
 				true ->
 					try doApply(MFAOrFun)
 					catch C:R:S ->
-						{error, {lockApplyError, {KeyOrKeys, MFAOrFun}, {C, R, S}}}
+						error({lockApplyError, KeyOrKeys, MFAOrFun, {C, R, S}})
 					after
 						eNifLock:releaseLock(KeyIx),
 						ok
 					end;
 				lockTimeout ->
-					{error, lockTimeout}
+					error({lockTimeout, KeyOrKeys, MFAOrFun})
 			end
 	end.
 
@@ -170,13 +170,13 @@ lockGet({?undefTab, Key = GetKey}, TimeOut) ->
 			try
 				#{{?undefTab, GetKey} => undefined}
 			catch C:R:S ->
-				{error, {lockGetError, {?undefTab, Key}, {C, R, S}}}
+				error({lockGetError, {?undefTab, Key}, {C, R, S}})
 			after
 				eNifLock:releaseLock(KeyIx),
 				ok
 			end;
 		lockTimeout ->
-			{error, lockTimeout}
+			error({lockTimeout, {?undefTab, Key}})
 	end;
 lockGet({EtsTab, Key} = GetKey, TimeOut) ->
 	KeyIx = erlang:phash2(GetKey, ?eGLockSize),
@@ -185,13 +185,13 @@ lockGet({EtsTab, Key} = GetKey, TimeOut) ->
 			try
 				#{GetKey => getEtsTabValue(EtsTab, Key, undefined)}
 			catch C:R:S ->
-				{error, {lockGetError, GetKey, {C, R, S}}}
+				error({lockGetError, GetKey, {C, R, S}})
 			after
 				eNifLock:releaseLock(KeyIx),
 				ok
 			end;
 		lockTimeout ->
-			{error, lockTimeout}
+			error({lockTimeout, GetKey})
 	end;
 lockGet({?undefTab, Key = GetKey, DefValue}, TimeOut) ->
 	KeyIx = erlang:phash2(GetKey, ?eGLockSize),
@@ -200,13 +200,13 @@ lockGet({?undefTab, Key = GetKey, DefValue}, TimeOut) ->
 			try
 				#{{?undefTab, GetKey} => getDefValue(DefValue)}
 			catch C:R:S ->
-				{error, {lockGetError, {?undefTab, Key, DefValue}, {C, R, S}}}
+				error({lockGetError, {?undefTab, Key, DefValue}, {C, R, S}})
 			after
 				eNifLock:releaseLock(KeyIx),
 				ok
 			end;
 		lockTimeout ->
-			{error, lockTimeout}
+			error({lockTimeout, {?undefTab, Key, DefValue}})
 	end;
 lockGet({EtsTab, Key, DefValue}, TimeOut) ->
 	GetKey = {EtsTab, Key},
@@ -216,13 +216,13 @@ lockGet({EtsTab, Key, DefValue}, TimeOut) ->
 			try
 				#{GetKey => getEtsTabValue(EtsTab, Key, DefValue)}
 			catch C:R:S ->
-				{error, {lockGetError, {EtsTab, Key, DefValue}, {C, R, S}}}
+				error({lockGetError, {EtsTab, Key, DefValue}, {C, R, S}})
 			after
 				eNifLock:releaseLock(KeyIx),
 				ok
 			end;
 		lockTimeout ->
-			{error, lockTimeout}
+			error({lockTimeout, {EtsTab, Key, DefValue}})
 	end;
 lockGet(EtsTabKeys, TimeOut) ->
 	{KeyIxs, KeysMap} = getKeyIxAndMaps(EtsTabKeys, [], #{}),
@@ -231,13 +231,13 @@ lockGet(EtsTabKeys, TimeOut) ->
 			try
 				#{OneGetKey => getEtsTabValue(OneEtsTab, OneKey, OneDefValue) || {OneEtsTab, OneKey} = OneGetKey := OneDefValue <- KeysMap}
 			catch C:R:S ->
-				{error, {lockGetError, EtsTabKeys, {C, R, S}}}
+				error({lockGetError, EtsTabKeys, {C, R, S}})
 			after
 				eNifLock:releaseLocks(KeyIxs),
 				ok
 			end;
 		lockTimeout ->
-			{error, lockTimeout}
+			error({lockTimeout, EtsTabKeys})
 	end.
 
 getKeyIxAndMaps([], IxAcc, KeysMap) -> {IxAcc, KeysMap};
@@ -290,13 +290,13 @@ transaction(EtsTabKeys, MFAOrFun, TimeOut) ->
 			catch
 				throw:Throw -> Throw;
 				C:R:S ->
-					{error, {lockTransactionError, {MFAOrFun, EtsTabKeys}, {C, R, S}}}
+					error({lockTransactionError, EtsTabKeys, MFAOrFun, {C, R, S}})
 			after
 				eNifLock:releaseLocks(KeyIxs),
 				ok
 			end;
 		lockTimeout ->
-			{error, lockTimeout}
+			error({lockTimeout, EtsTabKeys, MFAOrFun})
 	end.
 
 getDefValue(undefined) -> undefined;