Trying to Execute Catalog SSIS Package using Catalog stored proc by a Master SSIS package inside a Loop

Question

Hi Guys ,
To Execute Packages deployed in Catalog , I have created a wrapper SP  which internally calls  catalog SP  ( below is the code )
ALTER PROCEDURE [Publish].[usp_ExecutePackages]
              @PackageName NVARCHAR(255) 
       ,      @ProjectFolder    NVARCHAR(255) 
       ,      @ProjectName NVARCHAR(255) 
AS    
BEGIN
SET NOCOUNT ON;
DECLARE @Execution_id BIGINT ;
EXEC [SSISDB].[catalog].[create_execution] @package_name
= @PackageName
,   @execution_id
= @Execution_id OUTPUT
,   @folder_name
= @ProjectFolder
,   @project_name
= @ProjectName
,   @use32bitruntime=
True;
EXEC [SSISDB].[catalog].[set_execution_parameter_value] 
@execution_id,  
@object_type=50, 
@parameter_name=N'SYNCHRONIZED', 
@parameter_value=1
EXEC [SSISDB].[catalog].[start_execution]            @Execution_id
Since i have multiple Packages , I am looping through list of PackageName and trying to pass package names to this SP by ExecureSQLTask inside ForLoop Container . But it errors out saying 
 "Cannot access the package or the package does not exist. Verify that the package exists and that the user has permissions to it.
BUt same Execute SQL task , if i keep it outside the ForLoop Container it works perfectly fine . 
I am  clueless , Please Please HELP me ASAP :( 
Question :
How is that possible to execute same SP with same parameter outside Container , But not in SEQUENCE or FORLOOP or FOREACH Container ?
Also 
How to make a master package to execute SSIS deployed packages via TSQL using catalog stored proc ?
Please help me out .
Thanks 
Prasanna Selvaraju

Answer 1

Hi , 
After debugging i am getting parameter values as  
{Extract - ARTL.dtsx\r\n} Unable to evaluate the expression.
Why do i get  \r\n which i dont want in parameters .
Actually i pick the values of package name from a custom table . I check it there are no spaces in the cell.
Any IDEA WHY ? Please help
Finally it worked to call Wrapper Class for EXEC [SSISDB].[catalog].[create_execution]
stored procedure .
Basically , ERROR MESSAGE is culprit
 "Cannot access the package or the package does
not exist. Verify that the package exists and that the user has permissions to it. 
Above Message : causing us to think
its an Access issue , But actually when you pass parameter incorrectly even a " " space or "\n" extra to value, you will get that error .
Nothing related to access problem .
Actually , In the parameter which i was passing :
{Extract - ARTL.dtsx\r\n} --> String with Enter / Carriage Return and Break line was there 
I have removed the Enter in that variable value .
Now its WORKING FINE ! Hurry :D :)