Details About Function Module And Subroutine in SAP.

 1.Attributes:-

Attributes specify the type of the function module, normal or remote. 

We can access the normal function module with in the server only, where as we 

can access remote function modules with in the server as well as outside the server 

also.

2. Import acts like using in the subroutine.

3. Export acts like changing the subroutine.

4. Changing acts like both import & export.

5. Tables acts like both import & export only for internal tables.

6. Exception use to handle the errors.

7. Source code – the logic related to function module.

Differences between function module & subroutine:-

 Function module Subroutine 

1. Function modules are global, i.e., 

we can access the function module 

with in the server as well as outside 

the server also.

2. We can test the function module 

independently.

3. We can handle the errors in 

function module.

4. Function modules are defined by 

using SE37 transaction code.

1. Subroutines are local, i.e., we can 

access the subroutine with in the 

server only.

2. We can‘t test the subroutine 

independently without calling the 

subroutine.

3. We can‘t handle the errors in 

subroutine.

4. Subroutines are defined by using 

SE38 transaction code.

Steps to create function module:-

 Execute SE37.

 Provide your function module name.

 Create.

 Provide function group name & short description.

 Save.

Note:-

Function modules return single values, multiple single value