Execute package task fail

Hi all

I created a job for execute SSIS package using Execute package task (in file system). But after I run the job using BIDS I got error below.

Error 1 = Error: Error 0x80070020. Unable to access the package file, "D:\SSIS\U-Marketing\Packages\UMI_TOPS\CF_STG1_TOPS_SRC_UMI_REDEMPTIONOFFER.dtsx". Make sure the file exists and you have permission to access it.

Error2 = Error: Error 0x80070020 while loading package file "D:\SSIS\U-Marketing\Packages\UMI_TOPS\CF_STG1_TOPS_SRC_UMI_REDEMPTIONOFFER.dtsx". The process cannot access the file because it is being used by another process..

I search for this issue and try to following the step but still cannot fix the problem such verify permission of the specific path.

If you have any suggestion please help. Thank you in advance.