Try / catch while calling secondary stored procedure

Hi there. I have a stored procedure that collects data modified in the past day. This is put into a temp table. Then a while (1=1) loop is initiated where the top 1 record is selected from the temp table into a temp table variable. Several other variables are initiated from this temp table variable. At this point a BEGIN TRY is started with a BEGIN TRANSACTION following. The variables initiated are used as input parameters for another stored procedure called within this transaction. Should an error be created by the secondary stored procedure, this error then needs to inserted into a table created for this purpose, and the rest of the records be processed until done. It doesn't seem to be working. Can someone spot anything I might be doing wrong? It tells me about "Transaction count after EXECUTE indicates a mismatching number of BEGIN and COMMIT statements." It looks something like:

CREATE [storedProcedure]
AS
BEGIN TRY
DECLARE @variables

DROP #tempTable if it exists

CREATE #tempTable

DECLARE @tempTableVar
INSERT INTO #tempTable

WHILE (1=1)
BEGIN
INSERT INTO @tempTableVar
SELECT TOP 1 ... FROM #tempTable WHERE Is Processed = 0

SELECT @variables = variable FROM @tempTableVar --All necessary variables

BEGIN TRY
BEGIN TRANSACTION

Check to see if there is a record, if not break and raise error.

EXEC secondaryStoredProcedure @variables

UPDATE #tempTable
SET IsProcessed = 1
WHERE <conditions are met>

DELETE FROM @tempTableVar

COMMIT TRANSACTION
END TRY
BEGIN CATCH

IF @@TRANCOUNT > 0
ROLLBACK TRAN;

SELECT
@ErrorNumber = ERROR_NUMBER(),
@ErrorSeverity = ERROR_SEVERITY(),
@ErrorState = ERROR_STATE(),
@ErrorLine = ERROR_LINE(),
@ErrorProcedure = ISNULL(ERROR_PROCEDURE(), '-');

SELECT @ErrorMessage = ERROR_MESSAGE() + '(Error %d, Level %d, State %d, Procedure %s, Line %d).'

INSERT INTO [Marketing].[ImportErrors] (
ErrorType, --nvarchar(50)
ErrorMessage --nvarchar(max)
) VALUES (
'Accounts',
@ErrorMessage);

END CATCH

END
END TRY

BEGIN CATCH

IF (XACT_STATE() <> 0)
--IF @@TRANCOUNT > 0
ROLLBACK TRAN;

-- Do the error handling.
-- Assign variables to error-handling functions that
-- capture information for RAISERROR.
SELECT
@ErrorNumber = ERROR_NUMBER(),
@ErrorSeverity = ERROR_SEVERITY(),
@ErrorState = ERROR_STATE(),
@ErrorLine = ERROR_LINE(),
@ErrorProcedure = ISNULL(ERROR_PROCEDURE(), '-');

-- Building the message string that will contain original
-- error information.
SELECT @ErrorMessage =
'Message: '+ ERROR_MESSAGE() + N' (Error %d, Level %d, State %d, Procedure %s, Line %d).';

-- Raise an error: msg_str parameter of RAISERROR will contain
-- the original error information.
RAISERROR (
@ErrorMessage,
@ErrorSeverity,
1,
@ErrorNumber, -- parameter: original error number.
@ErrorSeverity, -- parameter: original error severity.
@ErrorState, -- parameter: original error state.
@ErrorProcedure, -- parameter: original error procedure name.
@ErrorLine); -- parameter: original error line number.

END CATCH