Issue with exec() command in 4.1

I am having issues with exec() in DS 4.1 The same script works fine in 3.2. Below is the script I am using -

$L_ETL_EXEC_FILE = 'JOB_XXX_ABC';

$L_ETL_FILENAME = GET_ENV ('LINK_DIR') || '\LOG\[$L_ETL_EXEC_FILE]' ;

print($L_ETL_FILENAME);

$L_RETURN_VARCHAR2 = EXEC ('[$L_ETL_FILENAME]', '', 8);

print('JOB_XXX_ABC Execution result: [$L_RETURN_VARCHAR2]');

Basically, this script kicks off another job. But when I run the job with the above script to kick off the other job, its giving error 50307/50616.

In the above EXEC statement, if I use '8', there's no error but this job is not kicking off the other job as it is supposed to. But if I use '1' in the above EXEC statement, its failing with error 50307/50616.

Function <exec> failed to launch program <E:\Program Files (x86)\SAP BusinessObjects\DataServices\LOG\JOB_XXX_ABC>, due to error <50616

Is this a privilege issue? In 3.2, this is all working fine.

In 4.1, we are having this issue. We are migrating the jobs from 3.2 to 4.1

Can someone please help?