@Dr Atul G- LNG @Ankur Bawiskar 

Thank you for prompt response, I have figured out an OOB acl on attachment table specifically on legal matter table, and since attachments from attachment variable will be stored as "ZZ_YYtableName" due to which OOB acl is failing as it is checking for "tableName".

We can do for HI ticket and ask to fix, or we can just have custom acl with expected condtion created bcus we can't change OOB acl bcus it will ditrub oob function,